Question 400006
5x+5y=1
3x-8y=5
.
Multiply top equation by 8:
40x+40y=8
3x-8y=5
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Multiply bottom equation by 5 and add equations together:
40x+40y=8
15x-40y=25
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55x = 33
x = 33/55
x = 3/5
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Substitute above into:
3x-8y=5
3(3/5)-8y=5
9/5-8y=5
9-40y=25
-40y=16
y = -16/40
y = -2/5
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solution: (x,y) = (3/5, -2/5)