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using elimination

What is the solution to the linear system?
x+y=2
3x-2y=-9 
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1 Answer

Multiplying the statement "x+y=2" by 3 and subtracting it from the statement "3x-2y=-9" gives "y=3". Therefore if x+y=2, then x+(3)=2, or x=2-3 or x=-1.

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