Question

3,5 + 8 = 2 ( × + 7 )

Answer 1

3,5 + 8 = 2(x + 7)
11,5 = 2x + 14
- 2x = 14 - 11,5
- 2x = 2,5 .(-1)
2x = - 2,5
x = - 2,5/2
x = 1,25

Answer 2

3,5 + 8 = 2 ( × + 7 )
3,5 + 8 = 2x + 14
3,5 + 8 - 14 = 2x
11,5 - 14 = 2x
2,5= 2x
2,5/2 = x
1,25= x