Question

A raiz 12×=5×+49
A raiz 5a-6=2(a+9)

Answer 1

Resposta:

a) x=7   b) a=8

Explicação passo-a-passo:

$12x=5x+49\\12x-5x=49\\7x=49\\x=\frac{49}{7} \\x=7$

$5a-6=2.(a+9)\\5a-6=2a+18\\5a-2a=18+6\\3a=24\\a=\frac{24}{3}\\a= 8$