. 629. a) 3 (x + 2) - x = 10;
B) 4x + 3 (x-7)=5;
A) 5 - x=4 (x - 3);
x) 7-(2x + 3)=9;
1
n) = (x – 4) + 3x = 5;
1
x + 9 = 18;
2
n) 5x
(x+​

Пошаговое объяснение:

a) 3 (x + 2) - x = 10

3x+6-x=10

2x+6=10

2x=4

x=2

B) 4x + 3 (x-7)=5

4x+3x-21=5

7x=26

x=26/7

A) 5 - x=4 (x - 3)

5-x=4x-12

17=5x

17/5=x

x) 7-(2x + 3)=9

7-2x-3=9

-2x+4=9

-2x=5

x=5/-2

n)  (x – 4) + 3x = 5

x--4+3x=5

4x=9

x=9/4

x + 9 = 18

x=9