Question 147780
y=5-3x
4x-5y=13 
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Rearrange:
3x + y = 5
4x -5y = 13
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Again:
15x + 5y = 25
4x  - 5y = 13
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Add the two equations to get:
19x = 38
x = 2
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Substitute into y = 5-3x to solve for "y":
y = 5-3*2 = -1
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Cheers,
Stan H.