Solve for x and y . 2y-7x=-9 and 4x+6=y

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asked Jul 7, 2018 175k views

1 vote

Solve for x and y . 2y-7x=-9 and 4x+6=y

Mathematics
middle-school

AruniRC asked

by AruniRC

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2 Answers

1 vote

2y-7x=-9
4x+6=y
2(4x+6)-7x=-9
8x-7x=-12-9
x=-21
y=4(-21)+6
y=-84+6
y=-78

Wizardzeb answered Jul 10, 2018

by Wizardzeb

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4 votes

2y-7x=-9

Step1: Add -2y to both sides

-7x+2y+-2y=-9+2y
-7x=-2y-9

Step 2: Divide both sides by -7

-7x/7=-2y-9/7

x= 2/7y+9/7

(this is for the first equation)

Elementstyle answered Jul 12, 2018

by Elementstyle

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