Question

Calcule o valor x
a) 4x-10=30
b) 5x-2=3x+18
c) 2x+8=20
d) 3x+5=x+15

Answer 1

A) 4x - 10 = 30 4x = 30 + 10 4x = 40 x = 40/4 x = 10 B)5x - 2 = 3x + 18 5x - 3x = 18 + 2 2x = 20 x = 20/2 x = 10 C)2x + 8 = 20 2x = 20 - 8 2x = 12 x = 12/2 x = 6 D) 3x + 5 = x + 15 3x - x = 15 - 5 2x = 10 x = 10/2 x = 5