SOLUTION: Solve the system of linera equations by the substitution method. y = -4/3x 4x +2y = 5/4

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Question 152468: Solve the system of linera equations by the substitution method.
y = -4/3x

4x +2y = 5/4
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
y=-4/3x
4x+2y=5/4
4x+2(-4x/3)=5/4
4x-8x/3=5/4
(3*4x-8x)/3=5/4
4(12x-8x)=3*5
4*4x=15
16x=15
x=15/16 answer.
y=-4/3*15/16
y=-4*5/16
y=-20/16=-5/4 answer.
proof:
4*15/16+2*-5/4=5/4
60/16-10/4=5/4
15/4-10/4=5/4
5/4=5/4