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Solve the system using elimination. x − 4y = 4 3x − 4y = −12

Solve the system using elimination. x − 4y = 4 3x − 4y = −12
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5 votes
Solve the system using elimination. x − 4y = 4 3x − 4y = −12

User Xiaocheng
by
8.5k points

1 Answer

6 votes
Common in both: -4y
Subtract the second from the first.
x-4y=4
3x-4y=-12
-2x=16
x=-8
Substitute in to find y.
-8-4y=4
-4y=12
y=-3
User Samuel Martins
by
8.1k points
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