SOLUTION: Solve using substitution 3x+y=13 2x-4y=18

Algebra ->  Test -> SOLUTION: Solve using substitution 3x+y=13 2x-4y=18      Log On


   

Question 402266: Solve using substitution
3x+y=13
2x-4y=18
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
y=13-3x
2x-4(13-3x)=18
2x-52+12x=18
14x=70
x=5
-----------
2*5-4y=18
10-4y=18
-4y=8
y=-2
-----------
3(5)-2=13