Question 229420
x=7y
4x+2y=36
4*7y+2y=36
28y+2y=36
30y=36
y=36/30
y=6/5 ans.
x=7*6/5=42/5 ans.
Proof:
4*42/5+2*6/5=36
168/5+12/5=36
180/5=36
36=36