Algebra system of equations

Question

What is the value of the y-coordinate of the solution to the system of equations?

x-2y=1

x+4y=7

Answer 1

To solve this, you simplify one of your equations and isolate one of the variables. If we want Y, then we isolate x so that we can replace it.

x = 1+2y : We plug the right side of this equation in for x in the second equation.

(1+2y) + 4y = 7 : Simplify and solve for y.

6y = 6 --> y = 1