3 years ago

-3x+4=15, 4x-y=-19 what is the solution by combining equations

1 answer:

5 0

-3x+4=15
-3x=15-4
-3x=11
x= -11/3

4(-11/3)-y= -19
-44/3-y= -19
-y= -19+44/3 multiply by (-1)
y=19-44/3
y=19•3/3-44/3
y=57/3-44/3
y=13/3

(x,y)=(-11/3, 13/3)

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