Question 412278
solving systems by elimination: 
Example of a problem: 
x - y = -3
5x + 3y = 1
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Multiply thru 1st equation by 3 to get:
3x - 3y = -9
5x + 3y = 1
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Add and solve for "x":
8x = -8
x = -1
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Solve for "y":
x - y = -3
y = x+3
y = -1+3
y = 2
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Solution (-1,2)