Question 34254: solve the following equations for x and y.
1.x+y=25
y=4x
2.x=y+8
2x+y=52
5. 3x+y=33
x=y-13
7.x-y=-10
3x=y+18 Answer by benni1013(206) (Show Source):
You can put this solution on YOUR website! I will help you solve one and you solve the others.
This is called solving equations by substitution.
x+y=25 and y=4x. Hold on we know that y=4x plug that into the first equation.
x+4x=25==>5x=25==>x=5.
Plug in 5 into one of the equations in order to get y. 5(4)=20.
Use this process for the remaining questions.
(