8=2³
4=2²
(2³)^x.(2²)^y=1/2²
(2)^3x.(2)^2y=2^-2
2^(3x+2y)=2^-2
3x+2y=-2
(2²)^x.(2)^-y=2
(2)^(2x-y)=2¹
2x-y=1
y=1-2x
3x+2(1-2x)=-2
3x+2-4x=-2
x=4
y=-7
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8=2³
4=2²
(2³)^x.(2²)^y=1/2²
(2)^3x.(2)^2y=2^-2
2^(3x+2y)=2^-2
3x+2y=-2
(2²)^x.(2)^-y=2
(2)^(2x-y)=2¹
2x-y=1
3x+2y=-2
2x-y=1
y=1-2x
3x+2(1-2x)=-2
3x+2-4x=-2
x=4
y=-7
_________________________________________