Question

Solve the system of equations and enter the solution as an ordered pair.

4x - 4y + 7 = 15
8y = 2x + 14

Answer 1

do you know how to solve an equation with one variable ?

Answer 2

are you trying to learn how to solve, or just want the answer ?

Answer 3

Solve the first equation for x:
4x + 7 = 15 + 4y
4x = 8 +4y
x = 2 + y

Substituting this for x in the second equation gives:
8y = 2(2+y) + 14
distributive property:
8y = 4 + 2y + 14
8y = 2y + 18
6y = 18
y = 18/6 = 3
So we know that y = 3

Substituting for y in the first equation gives:
4x -4(3) +7 = 15
4x - 12 + 7 = 15
4x -5 = 15
4x = 20
x = 5