Question

5 (X + 4) – X = 40 + 2X

Answer 1

Equação do primeiro grau

$\sf{5(x + 4) - x = 40 + 2x} \\ \sf{5x + 20 - x = 40 + 2x} \\ \sf{5x - x + 20 = 40 + 2x} \\ \sf{4x + 20 = 40 + 2x} \\ \sf{4x - 2x = 40 - 20} \\ \sf{2x = 40 - 20} \\ \sf{2x = 20} \\ \sf{x = \frac{20}{2} } \\ \colorbox{aqua}{ \sf{x = 10} }$

Resposta

X = 10

$\mathscr{ATT: \: \: ARMANDO}$