5. If x = 1, y = -1 is a solution of the linear equation 4x + ay = 8, find the value of a'. 1 io nolution of the lincon quation Ar + 39=1 find the value of 'a'. answer is (a=-4)
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x=1
y= -1
==>4x + ay= 8
==>4*(1)+ a*(-1)= 8
==>4 - a= 8
==>-a= 4
==>a = -4.
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