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Mathematics
Terrence Blake
29 November, 05:06
How to solve 2x+y=2 and x+y=-1
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Vanessa Stuart
29 November, 05:47
0
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
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