(X-140)^3:7^2=4^5-3^2.4^3.Tìm x
Tìm x: a) 7/2:x=-2 1/3( hỗn số 2 một phần 3). b) 2/3-|2x+3|=-1/5. c)(3/2.4/3.5/4......2010/2009-x=1000
Tìm x
a, x+1/9-3/5=3/6
b, 3/4-x+6/-11=5/6
C, X/4-3/7+2/5=31/140
D, 5/12+5/X-1/8=1/2
a, x + 1/9 - 3/5 = 3/6
x + 1/9 = 3/6 - 3/5
x + 1/9 = -1/10
x = -1/10 - 1/9
x = -19/90
720 : ( x . 2 + x . 3 ) = 3.2
720 : ( x . 2 + x.3 ) = 6
( x .2 + x.3 ) = 720 : 6
x.2+x.3 = 120
x . ( 2 + 3 ) = 120
x . 5 = 120
x = 120 : 5
x = 24
B1:Tính nhanh:
a)M= -1/3 . 141/17 - 39/3 . -1/17
b)N= -9/16 . 13/3 - (-3/4)^2 . 19/3
c)P=(1+1/1.3) (1+1/2.4) (1+1/3.5)......(1+1/99.101)
B2:Tìm x,biết
a)1/2+3/2:x=1/4
b)3/4+1/4.x=7
c)1/2.4 + 1/4.6 +.........+1/(2x-2).2x = 11/48
B3:Tìm x,biết
a)(x-1/2)^2=1/81
b)x+x(1+1/x)+x(1+2/x)=1/3
c)2/x+4=3/x+5
Câu 2 :Tìm x, biết :
a, 60-3.(x-2)=51
b, 541+(218-x)=725
c, 3.(5.x-13)=34
d, (2.x-7)-(x+135)=0
e, 532-8.(x+3)=52.4
\(a,60-3.\left(x-2\right)=51\)
\(3.\left(x-2\right)=60-51\)
\(3.\left(x-2\right)=9\)
c \(x-2=9:3\)
\(x-2=3\)
\(x=3+2\)
\(x=5\)
\(b,541+\left(218-x\right)=725\)
\(218-x=725-541\)
\(218-x=184\)
\(x=218-184\)
\(x=34\)
\(c,3.\left(5x-13\right)=3^4\)
\(3.\left(5x-13\right)=81\)
\(5x-13=81:3\)
\(5x-13=27\)
\(5x=27+13\)
\(5x=40\)
\(x=8\)
\(d,\left(2x-7\right)-\left(x+135\right)=0\)
\(2x-7-x-135=0\)
\(x-142=0\)
\(x=0+142\)
\(x=142\)
còn phần e nữa mà bạn
bạn làm cả phần e đi mình k cho
1,4 x 15/49 - (4/5+2/3) : 2 và 1/5
3 và 1/3 x X + 16 và 3/4 = -13,25
(2 và 1/5 + 3/5 x X) =3/4
(2.4 x X - 36) : 1 và 5/7 = -1
0.25 : ( 10,3 - 9,8) - 3/4
(3 và 4/5 - 2 x X ) x 1 VÀ 1/3 = 5 và 5 /7
=1,4 x\(\dfrac{15}{49}-\) \(\left(\dfrac{4}{5}+\dfrac{2}{3}\right)\) : 2\(\dfrac{1}{5}\)
= \(\dfrac{3}{7}\) - \(\dfrac{22}{15}\) : \(\dfrac{11}{5}\)
= \(\dfrac{3}{7}\) - \(\dfrac{2}{3}\)
= \(-\dfrac{5}{21}\)
( 2\(\dfrac{1}{5}\) + \(\dfrac{3}{5}\) \(\times\) \(x\)) = \(\dfrac{3}{4}\)
\(\dfrac{11}{5}\) + \(\dfrac{3}{5}\)\(x\) = \(\dfrac{3}{4}\)
\(\dfrac{3}{5}\)\(x\) = \(\dfrac{3}{4}\) - \(\dfrac{11}{5}\)
\(\dfrac{3}{5}\)\(x\) = - \(\dfrac{29}{20}\)
\(x\) = -\(\dfrac{29}{12}\)
3\(\dfrac{1}{3}\) x \(x+16\)\(\dfrac{3}{4}\)= 13,25
\(\dfrac{10}{3}\) x \(x\) + \(\dfrac{67}{4}\) = 13,25
\(\dfrac{10}{3}\) x \(x\) = 13,25 - \(\dfrac{67}{4}\)
\(\dfrac{10}{3}\times x=\) \(\dfrac{103}{28}\)
\(x\) = \(\dfrac{103}{28}:\dfrac{10}{3}\)
\(x=\) \(\dfrac{309}{280}\)
giai giup mik nha:
Bài 1 Tìm x
1.3/4:x/6=75/100
2.(1/4*x-1/8)*3/4-1/4
3.71+65*4=x+140/x +260
4.7878:(12*x-91)=78
5.2/7+3/7<x<14/5+7/5
6.(x+1)+(x+4)+(x+7)+(x+10)+....+(x+34)=330
7.96-3,75:x=94,5
8.(7*13+8*13):(29/3-x)=39
Lưu ý:câu3 có nghĩa là x+140 trên x rồi +260
1) 3/4 : x/6 = 75/100
x/6 = 3/4 : 75/100
x/6 = 1
x = 1*6
x = 6
Câu 6: Bạn xem ở đây: http://olm.vn/hoi-dap/question/615090.html
giai giup mik nha:
Bài 1 Tìm x
1.3/4:x/6=75/100
2.(1/4*x-1/8)*3/4-1/4
3.71+65*4=x+140/x +260
4.7878:(12*x-91)=78
5.2/7+3/7<x<14/5+7/5
6.(x+1)+(x+4)+(x+7)+(x+10)+....+(x+34)=330
7.96-3,75:x=94,5
8.(7*13+8*13):(29/3-x)=39
Lưu ý:câu3 có nghĩa là x+140 trên x rồi +260
1.\(\frac{3}{4}:\frac{x}{6}=\frac{75}{100}\) \(\Leftrightarrow\frac{3}{4}.6.\frac{1}{x}=\frac{3}{4}\)
\(\Leftrightarrow\frac{6}{x}=1\)
\(\Leftrightarrow x=\frac{1}{6}\)
cậu giải đi. cau 2 ko giải đâu
1. 13-(x-5)=8 8. (x-5)^6=(x-5)^8
2. 8-(x-10)=23-(-4+12) 9. (3-x).(x-3)=0
3. 134-5(x+4)=34 10. -32-(x-5)=0
4. |5-x|=7
5. 20+8.(x+3)=5^2.4
6. 42x=39.42-37.42
7. |x|=2-(-7)
tìm x biết
x/3 -3/7+2/5=31/140
Bài làm
\(\frac{x}{3}-\frac{3}{7}+\frac{2}{4}=\frac{31}{140}\)
\(\frac{x}{3}=\frac{31}{140}-\frac{2}{4}+\frac{3}{7}\)
\(\frac{x}{3}=\frac{31}{140}-\frac{70}{140}+\frac{60}{140}\)
\(\frac{x}{3}=\frac{21}{140}\)
\(\frac{x}{3}=\frac{3}{20}\)
=> \(x.20=3.3\)
=> \(x=\frac{3.3}{20}\)
=> \(x=\frac{9}{20}\)
Vậy \(x=\frac{9}{20}\)
# HỌc tốt #
\(\frac{x}{3}-\frac{3}{7}+\frac{2}{5}=\frac{31}{140}\)
\(\frac{x}{3}=\frac{1}{4}\)
x = \(\frac{3}{4}\)