{x y {_ - _ =0 {10 5 {5x y {_ + _ =7 {3 6

Question

{x y
{_ - _ =0
{10 5
{5x y
{_ + _ =7
{3 6

Answer 1

Х/10 - у/5=0
5х/3+у/6=7

х-2у=0
10х+у=42

х=2у
10*2у+у=42

х=2у
21у=42

х=4
у=2