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x-(xx0.29)=100
We move all terms to the left:
x-(xx0.29)-(100)=0
We add all the numbers together, and all the variables
x-(+xx0.29)-100=0
We get rid of parentheses
x-xx0.29-100=0
We move all terms containing x to the left, all other terms to the right
x-xx0.29=100
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