Resposta :
Resposta:
a) 5.(x+10) = 2x + 40
5x + 50 = 2x + 40
5x - 2x = 40 - 50
3x = - 10
[tex]x = - \frac { 10}{3} [/tex]
b) 2x - 30 = x + 5 - 3
2x - x = 5 - 3 + 30
x = 2 + 30
x = 32
c) 4x + 30 = 46
4x = 46 - 30
4x = 16
[tex]x = \frac{16}{4} [/tex]
x = 4