2x+y=10

Y=5x-11

Solve the system of equations by substitution

The answer would be (3,4)

2x+5x-11=10!

So once you combine like terms - 2x+5x, you end up with 7x-11=10

You then have to add 11 to both sides of the equal sign and you get 7x=21. If you divide both sides by 7, you end up with x=3.

Did you need what Y was, too? If so, you just go back to the original problem:

2 (3) + y=10

2 times 3 = 6+y=10.

Subtract 6 from both sides and you get Y=4!