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How to solve 2x+y=2 and x+y=-1
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5 votes
How to solve 2x+y=2 and x+y=-1

User SUX
by
8.1k points

1 Answer

3 votes
so
2x+y=2
x+y=-1

multiply secion equation by -1
-x-y=1

add to first equation

2x-x+y-y=2+1
x=3
subsitute
3+y=-1
subtract 3
y=-4

x=3
y=-4
User Franey
by
8.0k points
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