3x-y=8.........(1)
x+2y=5.......(2)
multiply equation 2 with 3
There fore
3x-y=8.........(1) and
3x+6y=15.....(2)
(2)-(1) implies
7y=7
y=7/7=1
put y=1 in equation 1
3x-1=8
3x=8+1=9
3x=9
x=9/3=3
Therefore x = 3 and y=1
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