Question 38453
y = 2x
4x - y = 10 


Sinc y=2x, substitute that value into the 2nd equation to get:
4x-(2x)=10
2x=10
x=5
Substitute that into the 1st equation to get:
y=2(5)=10
Solution: x=5, y=10
Cheers,
Stan H.