(1/2)^(x+2)=(1/2)^(-4x)
x+2=-4x
5x=-2
x=-2/5
2^(x-5)=2^(3x-15)
x-5=3x-15
2x=10
x=5
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(1/2)^(x+2)=(1/2)^(-4x)
x+2=-4x
5x=-2
x=-2/5
2^(x-5)=2^(3x-15)
x-5=3x-15
2x=10
x=5