Question

y=2x-1
2x+2y=22

Answer 1

You have two equations.

In the first, you have y as a function of x.

So what you can do in the second equation is replace y with the function (in this case 2x-1).

Then solve for x.

After that, use your first equation to solve for y.

Answer 2

you can sub 2x - 1 in for y in the second equation