Question

49-Verificar se o número 4 é raiz da equação 9a - 4 = 8 + 6a 26 raiz damarão 2-3 = 3y + 2​

Answer 1

Resposta:

$9a - 4 = 8 + 6a 26\\\\9a-4=8+156a\\\\9a-4+4=8+156a+4\\\\9a=156a+12\\\\9a-156a=156a+12-156a\\\\-147a=12\\\\\frac{-147a}{-147}=\frac{12}{-147}\\\\a=-\frac{4}{49}\\\\\\\\2-3 = 3y + 2\\\\2-3-2=3y+2-2\\\\-3=3y\\\\3y=-3\\\\\frac{3y}{3}=\frac{-3}{3}\\\\y=-1$