460 + 85 *4 = x + 175 / 5 + 30

460 + 340 = x + 35 + 30

800 = x + 65

x = 800 - 65

x = 735

 460 +  85 *4 = x + 175 :5 +  30    

    460 + 340  = x + 35 + 30

           800     = x + 65

            x         = 800 - 65 = 735

460+85*4=x+\(\frac{175}{5}\)+30

460+340=x+35+30

800=x+65

x=800-65=735

460 + 85 x 4 = x + 175/5 + 30

460 + 340 = x + 35 + 30

800 = x + 65

x = 800 - 65

x = 735

460 + 85 x 4 = x + 175/5 + 30

460 + 340 = x + 35 + 30

800 = x + 65

x = 800 - 65

x = 735

cảm ơn Hữu Nghĩa nhé , anh họ tôi

1)

a) \(\left(-175\right)-123+3+175+\left(-3\right)\)

\(=\left[\left(-175\right)+175\right]+\left[3+\left(-3\right)\right]-123\)

\(=0+0-123\)

\(=-123\)

b) \(17.85+15.17-150\)

\(=17.\left(85+15\right)-150\)

\(=17.100-150\)

\(=1700-150\)

\(=1550\)

c) \(176:\left(4.5^2-3.2^2\right)\)

\(=176:\left(4.25-3.4\right)\)

\(=176:\left(100-12\right)\)

\(=176:88\)

\(=2\)

2)

a) \(8-x=-12\)

\(\Rightarrow x=8-\left(-12\right)\)

\(\Rightarrow x=8+12\)

\(\Rightarrow x=20\)

Vậy \(x=20\)

b) \(20+2^3.x=5^2.4\)

\(\Rightarrow20+8.x=25.4\)

\(\Rightarrow20+8.x=100\)

\(\Rightarrow8.x=100-20\)

\(\Rightarrow8.x=80\)

\(\Rightarrow x=80:8\)

\(\Rightarrow x=10\)

Vậy \(x=10\)

c) \(2\left|x-1\right|+5=15\)

\(\Rightarrow2\left|x-1\right|=15-5\)

\(\Rightarrow2\left|x-1\right|=10\)

\(\Rightarrow\left|x-1\right|=10:2\)

\(\Rightarrow\left|x-1\right|=5\)

Xét trường hợp 1: \(x-1=5\)

\(\Rightarrow x=5+1\)

\(\Rightarrow x=6\)

Xét trường hợp 2: \(x-1=-5\)

\(\Rightarrow x=\left(-5\right)+1\)

\(\Rightarrow x=-5+1\)

\(\Rightarrow x=-\left(5-1\right)\)

\(\Rightarrow x=-4\)

Vậy \(x=6\) hoặc \(x=-4\)

Bài 1:

\(a)\left(-175\right)-123+3+175+\left(-3\right)\)

\(=\left[\left(-175\right)+175\right]+\left[\left(-3+3\right)\right]-123\)

\(=0+0-123\)

\(=-123\)

\(b)17.85+15.17-150\)

\(=17.\left(85+15\right)-150\)

\(=17.100-150=1700-150=1550\)

\(c)176:\left(4.5^2-3.2^2\right)\)

\(=176:\left(4.25-3.4\right)\)

\(=176:\left(100-12\right)=176:88=2\)

Bài 2:

\(a)8-x=-12\)

\(\Rightarrow x=8-\left(-12\right)\)

\(\Rightarrow x=20\)

\(b)20+2^3.x=5^2.4\)

\(\Rightarrow20+8.x=25.4\)

\(\Rightarrow20+8.x=100\)

\(\Rightarrow8.x=100-20\)

\(\Rightarrow8.x=80\)

\(\Rightarrow x=80:8=10\)

\(c)2\left|x-1\right|+5=15\)

\(\Rightarrow2\left|x-1\right|=15-5\)

\(\Rightarrow2\left|x-1\right|=10\)

\(\Rightarrow\left|x-1\right|=10:2\)

\(\Rightarrow\left[{}\begin{matrix}x-1=5\\x-1=-5\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=6\\x=-4\end{matrix}\right.\)

\(460+85\) x \(4=\frac{x+175}{5}+30\)

 \(460+340=\frac{x+175}{5}+30\)

\(800=\frac{x+175}{5}+30\\ \frac{x+175}{5}=800-30\\ \frac{x+175}{5}=770\)

\(x+175=770\) x \(5\)

\(x+175=3850\\ x=3850-175\\ x=3675\)

460 - 80 x 4 = ( x + 200) : 4
460 - 340 = (x + 200) : 4
120 = ( x + 200) : 4
x + 200 = 120 x 4
x + 200 = 480
          x = 480 - 200
          x = 280

ad ko biết nha

nhân hết ra là xong nha 

a)  85x35-85x27-35x85+35x27=27x(35-85)=-1350

mấy cái kia cũng tương tự v 

_Kudo_

=85.35-85.27-35.85+35.27

=85.35+85.(-27)-35.85+35.27

=85[35+(-27)+(-35)]+35.27

=85.(-27)+35.27

=-85.27+35.27

=27.[(-85)+35]

=27.(-50)

=-1350

khó à nghen

`@` `\text {Ans}`

`\downarrow`

`A)`

`37 \times 46+37 \times 51+111`

`= 37 \times (46+51)+111`

`= 37 \times 97+111`

`= 3589 +111`

`= 3700`

`B)`

`35 \times 215-35 \times 210-175`

`= 35 \times (215-210)-175`

`= 35 \times 5-175`

`= 175-175=0`

`E)`

`76 \times 102-76 \times 2`

`= 76 \times (102-2)`

`= 76 \times 100`

`= 7600`

`C)`

`85 \times 94+85 \times 2 +170 \times 2`

`= 85 \times (94+2) + 170 \times 2`

`= 85 \times 96+170 \times 2`

`= 8160+340`

`= 8500`

`48 \times 56+28 \times 104`

`= 48 \times 28 \times 2+28 \times 104`

`= 28 \times (48 \times 2+104)`

`= 28 \times (96+104)`

`= 28 \times 200`

`= 5600`

`G)`

`206 \times 12-206-206`

`= 206 \times (12-1-1)`

`= 206 \times 10`

`= 2060`

a) 37 x 46 + 37 x 51 + 111

= 37 x ( 46 + 51 ) + 111

= 37 x 97 + 111

= 3589 + 111

= 3700

b) 35 x 215 - 35 x 210 - 175

= 35 x ( 215 - 210 ) - 175

= 35 x 5 - 175

= 175 - 175

= 0

e) 76 x 102 - 76 x 2

= 76 x ( 102 - 2 )

= 76 x 100

= 7600

c) 85 x 94 + 95 x 2 + 170 x 2

= 7990 + 2 x ( 95 + 170 )

= 7990 + 2 x 265

= 7990 + 530

= 8520

48 x 56 + 28 x 104

= 2688 + 2912

= 5600

g) 206 x 12 - 206 - 206

= 2472 - 206 - 206

= 2266 - 206

= 2060

\(a,5x-16=40-1\)

<=>\(5x=40-1+16\)

<=>\(5x=55\)

<=>\(x=11\)

\(b,x-10=-25\)

<=>\(x=\left(-25\right)-10\)

<=>\(x=-35\)

\(c,-12+x=-30\)

<=>\(x=\left(-30\right)+12\)

<=>\(x=-18\)

a) 5x-16=40-1

5x-16=39

5x=39+16

5x=55

x=55:5

x=11

b)x-10=(-25)

x=(-25)+10

x=(-15)

c) -12+x= -30

           x= -30-(-12)

           x= -30+12

           x= -18

d) 2x +12 = -40+ 6

2x+12=(-34)

2x=(-34)-12

2x=(-46)

x=(-46):2

x=(-23)

e)125:(3x-13)=25

3x-13=125:25

3x-13=5

3x=5+13

3x=18

x=18:3

x=6

f)541+(218-x)=735

218-x=735-541

218-x=194

x=218-194

x=  24

g) 3(2x+1)-19=14

3(2x+1)=14+19

3(2x+1)=33

2x+1=33:3

2x+1=11

2x=11-1

2x=10

x=10:2

x=5

h)175-5(x+3)=85

5(x+3)=175-85

5(x+3)=90

x+3=90:5

x+3=18

x=18-3

x=15

i)8x+(-3)=39

8x=39-(-3)

8x=42

x=42:8

x=42/8

L)2x+4x=36+(-6)

6x=30

x=30:6

x=5