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0.9^x-0.7=9.2
We move all terms to the left:
0.9^x-0.7-(9.2)=0
We add all the numbers together, and all the variables
0.9^x-9.9=0
We move all terms containing x to the left, all other terms to the right
0.9^x=9.9
x=9.9/1
x=9.9
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