Question 103111
10x = 2y - 7
y=-5x + 3 
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Rewrite each equation:
10x - 2y = -7
-5x - y  = -3
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Multiply the 2nd equation by 2:
10x - 2y = -7
-10x -2y = -6
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Add the equations to get:
-4y = -13
y = 13/4
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Substitute into 10x = 2y -7 to solve for "x":
10x = 2(13/4) -7
10x = 13/2 - 14/2
10x = -1/2
x = -1/20
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Cheers,
Stan H.