Question

1)2x = 18-х
2) 7x + 3 = 30 - 2x
3) 3(x - 2) = x + 2
4) 9x – 7 = 6x + 14​

Answer 1

Ответ:

1)2x+x=18

3x=18

x=18:3

x=6

2)7x+2x=30-3

9x=27

x=27:9

x=3

3)3x-6=x+2

3x-x=2+6

2x=8

x=8:2

x=4

4)9x-6x=14+7

3x=21

x=21:3

x=7