SOLUTION: 4x-7y=8 -2x+5y=-1 I have struggling with this problem for quite awhile now. Please help!

Algebra ->  Expressions-with-variables -> SOLUTION: 4x-7y=8 -2x+5y=-1 I have struggling with this problem for quite awhile now. Please help!      Log On


   



Question 334302: 4x-7y=8
-2x+5y=-1
I have struggling with this problem for quite awhile now. Please help!

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
4x-7y=8
-2x+5y=-1
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Multiply thru the 1st eq. by 2
Multiply thru the 2nd eq. by 4
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8x - 14y = 16
-8x+ 20y = -4
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Add the two equations and solve for "y":
6y = 12
y = 2
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Substitute into 4x-7y = 8 and solve for "x":
4x -7*2 = 8
4x - 14 = 8
4x = 22
x = 11/2
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Cheers,
stan H.