Solve, using the substitution method 2x+4y=16 x-7=-4y A. (0,-7) B. (0,7/4) C. (9,-1/2) D. (17,-5/2) PLEASE HELP ASAP !!

asked Aug 20, 2016 147k views

2 votes

Solve, using the substitution method

2x+4y=16 x-7=-4y

A. (0,-7)
B. (0,7/4)
C. (9,-1/2)
D. (17,-5/2)

PLEASE HELP ASAP !!

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1 vote

2x+4y=16
x-7=-4y

4y=16-2x
4y=16-2(-4y+7)
4y=16+8y-14
-4y=2
-4y/-4=2/-4
y=-0,5

2x=16-4(-0,5)
2x=16+2
2x/2=18/2
x=9

C

Minja answered Aug 25, 2016

by Minja

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