SOLUTION: 1.5x-2y=-0.25 3x+1.5y=6.375 Solve with addition method

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: 1.5x-2y=-0.25 3x+1.5y=6.375 Solve with addition method       Log On


   

Question 146221: 1.5x-2y=-0.25
3x+1.5y=6.375
Solve with addition method
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
First, multiply the first equation by -2.
giving
-3x+4y=.5
3x+1.5y=6.375
Now we can add them.
5.5y=6.875
y=1.25

And x must be
1.5x-2(1.25)=-.25
1.5x=2.25
x=1.5
check:
1.5(1.5)-2(1.25)=-.25
3(1.5)+1.5(1.25)=6.375