Question

qual e a resposta gente3x+19=31

Answer 1

31 - 19 = 12
12 ÷ 3 = 4
x = 4

Answer 2

Olá!

$3x + 19 = 31$


$3x = 31 - 19$

$3x = 12$


$x = 12 \div 3$

$x = 4$