Question

5) Resolva as equações do 1° grau abaixo:
a) 6x + 10 = 2x + 22
b) 7x + 3 = 11x – 5
c) 5x + 3 = 38

Answer 1

Explicação:

$a) 6x + 10 = 2x + 22\\6x - 2x = 22 - 10\\4x = 12\\x = \frac{12}{4} \\x = 3$

$b) 7x + 3 = 11x - 5\\7x - 11x = -5 - 3 \\-4x = -8\\-4x.(-1) = -8.(-1)\\4x = 8\\x = \frac{8}{4} \\x = 2$

$c) 5x + 3 = 38\\5x = 38 - 3\\5x = 35\\x = \frac{35}{5} \\x = 7$