Question

Calcule x:

Somente a questão 4

Answer 1

A
4x + 10 = 2x + 40
4x - 2x = 40 - 10
2x = 30
x = 30/2 = 15

B
5x - 70 = 2x + 20
5x -2x = 70 + 20
3x = 90
x = 90/3 = 30

C
5x = x + 100
5x - x = 100
4x = 100
x = 100/4 = 25