Question

Responda quanto vale (X)

A) x - 3 = -5 X = ?

B) 2x + 4 = 20 X = ?

C) 6x - 14 = 10 X = ?

Answer 1

A) Temos que x - 3 = -5 => x = -5 + 3 => x = -2

B) 2x + 4 = 20 => 2x = 20 - 4 => 2x = 16 => x = 16/2 => x = 8

C) 6x - 14 = 10 => 6x = 10 + 14 => 6x = 24 => x = 24/6 => x = 4