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we can write
x-y =1 ----- (Eq 1)
4x-y =10 ----- (Eq 2)
to eleminate y let us subtract Eq 2 -Eq 1 we get
(4x-x ) +(-y+y) = 10-1
or 3x = 9
divide both side by 3 we get ; x = 3
Substitute value of x in equation 1 we get
y = 3-1 = 2
Answer : x = 3 & y = 2
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