Question

9 x- 3 ( 2x +2)= 15. d)2,5(x-2)-1,5x=1

Answer 1

9x-6x-6=15
9x-6x=15+6
3x=21
x=7

2,5x-5-1,5x=1
2,5x-1,5x=1+5
1x=6
x=6

Answer 2

9x-3(2x+2)=15
9x-6x-6=15
9x-6x = 15+6
3x=21
x=21/3
x=7

d) 2,5x-5-1,5x=1
2,5x-1,5x=1+5
1x=6
x=6