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x=0.3x-20.5
We move all terms to the left:
x-(0.3x-20.5)=0
We get rid of parentheses
x-0.3x+20.5=0
We add all the numbers together, and all the variables
0.7x+20.5=0
We move all terms containing x to the left, all other terms to the right
0.7x=-20.5
x=-20.5/0.7
x=-29+0.2/0.7
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