Question

Resolva as equações:
A) x + 4 = 9
B) 2x-1=3
C) 3x-9+1=10+9
D) 5x-6=4x-5

Answer 1

a) x + 4 = 9 => x = 9 - 4 => x = 5


b) 2.x - 1 = 3 => 2.x = 3 + 1 => 2.x = 4 => x = 4/2 => x = 2


c) 3.x - 9 + 1 = 10 + 9 => 3.x - 8 = 19 => 3.x = 19 + 8 => 3.x = 27 => x = 27/3 => x = 9

d) 5.x - 6 = 4.x - 5 => 5.x - 4.x = -5 + 6 => x = 1