3x+5y=31;2x-3y=20
elimination method solve fast
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Answer:
3x+5y=31 (x2)
2x-3y=20 (x3)
6x+10y=62
6x-9y=60
(-) (+) = (-)
19y=2
y=2/19
put y=2/19 in equation 2x-3y=20
2x-3(2/19)=20
2x-6/19=20
2x=20+6/19
2x=20(19)+6/19
2x=386/19
x=386/38
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