solve for x
3(2^x+1)-(2^x+2)+5=0
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6x^2+6-2x^2-2+5
4x^2-1=0
4x^2=1
x^2=1/4
x=1/2,-1/2
4x^2-1=0
4x^2=1
x^2=1/4
x=1/2,-1/2
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