Question

помогите розвязать уровнение пж
1) 2x=18-x;
2) 7x+3=30-2x;
3) 7-2x=3x-18.

ДАЮ 28 БАЛЛОВ

Answer 1

7x+3=30-2x
7x+2x=30-3
9x=27
X=27:9
X=3

Answer 2

1)

2x = 18-x

2x+x = 18

3x = 18

x = 6

2)

7x+3 = 30−2x

7x+2x = 30−3

9x = 27

x = 3

3)  

7−2x=3x−18

−2x−3x = −18−7

−5x = −25

x = 5