Two- step equations Algebra 1
If 4y=x+13 and x+2y=5, then x+y=
4y = x + 13
x + 2y = 5
From the second equation, we get
x + 2y = 5
x = -2y + 5
Substitute that into the first equation.
4y = x + 13
4y = (-2y + 5) + 13
4y = -2y + 18
6y = 18
y = 3
The second equation can be used to solve for x.
x + 2y = 5
x + 2(3) = 5
x + 6 = 5
x = -1
Finally,
x + y =
-1 + 3 = 2