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Solve the system of equations by elimination. 3x+4y=31 2x-4y=-6

Solve the system of equations by elimination. 3x+4y=31 2x-4y=-6
asked 115k views
3 votes
Solve the system of equations by elimination.
3x+4y=31
2x-4y=-6

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User Steve Grossi
by
7.9k points

1 Answer

5 votes
Hello,

3x+4y=31 ==>4y=31-3x
2x-4y=-6==>2x-(31-3x)=-6==>5x=-6+31==>5x=25
==>x=5 and y=(31-3*5)/4=4

answered
User Ingdc
by
7.8k points
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