Question

O conjunto solução da equação 10(x+1) - 5(x-2) = 70 é:

Answer 1

$10(x+1) - 5(x-2) = 70\\\\ 10x+10(1)-5x+5(2) = 70\\\\ 10x+10-5x+10 = 70\\\\ 10x-5x = 70-10-10\\\\ 5x = 50\\\\x=\frac{50}{5}\\\\ \boxed{x=10}\\\\\\ S=\{x \in \mathbb{R}\ /\ x =10 \}\\\\S=\{10\}$

Bons estudos!