Question

determine o Valor do X

Answer 1

2x + 5 = 3x
2x - 3x = - 5
- x = - 5   .(-1)
x = 5
.....................................

3x - 2 = x
3x - x = 2
2x = 2
x = 2
      2
x = 1
.....................................

10x + 20 = 14x
10x - 14x = - 20
- 4x = - 20   .(-1)
4x = 20
x = 20
       4
x = 5
.....................................

5 + 2x = 12 + x
2x - x = 12 - 5
x = 7