Question

Sistemas............

Answer 1

$\frac{x+y}{4}-\frac{x-y}{6}=\frac{5}{3}\\ \\ 3x+3y-(2x-2y)=20\\ \\ 3x+3y-2x+2y=20\\ \\ \boxed{x+5y=20}$

$x+2(y-3)=5\\ \\ x+2y-6=5\\ \\ \boxed{x+2y=11}\\ \\ Subtraindo \ as \ equacoes:\\ \\ 3y=9\\ \\ \boxed{y=3}\\ \\\boxed{x=5}$