Question

2,5 (2х+3)-2 (х+2,5)=3,5+2х

Answer 1

5х+7,5-2х-5=3,5+2х
3х+7,5-5=3,5+2х
3х-2х=3,5-2,5
х=1

Answer 2

2,5(2x+3)-2(x+2,5)=3,5+2x

5x+7,5-2x-5=3,5+2x

3x+2,5=3,5+2x

x=1