5x+3(10-x)+x=45

5x+x+3(10-x)=45

6x+3(10-x)=45

phân phối:

6x+3.10-3x=45

6x+30-3x=45

6x-3x+30=45

3x+30=45

3x=45-30

3x=15

x=15/3

Vậy x=5

\(5x+3\left(10-x\right)+x=45\)

\(\Leftrightarrow5x+30-3x+x=45\)

\(\Leftrightarrow3x+30=45\)

\(\Rightarrow3x=15\rightarrow x=5\)

vì sao lại là 30 vậy

\(i)4^8:x=4^6\\ x=4^8:4^6\\ x=4^2\\ k)12x-33=3^5\\ 12x-33=243\\ 12x=243+3\\ 12x=276\\ x=276:12\\ x=23\\ l)\left(5x+335\right):2=20^2\\ \left(5x+335\right):2=400\\ 5x+335=400.2\\ 5x+335=800\\ 5x=800-335\\ 5x=465\\ x=465:5\\ x=93\) 

\(m)\left(x^2-10\right):5=3\\ x^2-10=3.5\\ x^2-10=15\\ x^2=15+10\\ x^2=25\\ x^2=5^2\\ 740:\left(x+10\right)=10^2-2.13\\ 740:\left(x+10\right)=100-26\\ 740:\left(x+10\right)=74\\ x+10=740:74\\ x+10=10\\ x=10-10\\ x=0.\)

i) 4⁸:x=4⁶

<=> x = 4⁸ : 4⁶ = 4² = 16

k)12x-33=3⁵

<=> x = (3⁵ + 33) : 12 = 23

l)(5x+335):2=20²

<=> x = (20² x 2 - 335) : 5 = 93

m)(x²-10):5=3

<=> x² = 3 x 5 + 10 = 25

<=> x = 5 hoặc x = -5

740:(x+10)=10²-2.13

<=> x = 740 : (10² - 2.13) - 10 = 0

a,4^8:X=4^6

X=4^8:4^6

X=4^2

b,12x-33=3^5

12x-33=243

12x=243+33

12x=276

12*X=276

X= 276:12

x=23

c,(5x+335):2=20^2

(5x+335):2=400

(5x+335)=400*2

(5x+335)=800

5*x+335=800

5*x=800-335

5*x=465

x=465:5

x=93

d, (x^2-10):5=3

x^2-10=3*5

x^2-10=15

x^2=15+10

x^2=25

x^2=5^2

vậy x=5

e,740:(x+10)=10^2 - 2*13

740:(x+10)=10^2-26

740:(x+10)=100-26

740:(x+10)=74

x+10=740:74

x+10=10

x=10-10

x=0

nhớ tik cho mik nhé

Đề bài là j vậy ak ??

Đề bài ???????

\(\frac{-45}{91}< \frac{777}{999}\)vì:

\(\frac{-45}{91}< 1< \frac{777}{999}\)

x = -2;-1;0;1;2;3;4;5;6

x thuộc (-2;-1;0;1;2;3;4;5;6)

gửi thư cho tớ , tớ trả lời chi tiết cho cậu nhé

co lẻ là có rất nhiều số