2^x=4-12=20

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Solution for 2^x=4-12=20 equation: 



2^x=4-12=20

We move all terms to the left:

2^x-(4-12)=0

We add all the numbers together, and all the variables

2^x-(-8)=0

We add all the numbers together, and all the variables

2^x+8=0

We move all terms containing x to the left, all other terms to the right

2^x=-8

x=-8/1

x=-8

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