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0.7x=x-20
We move all terms to the left:
0.7x-(x-20)=0
We get rid of parentheses
0.7x-x+20=0
We add all the numbers together, and all the variables
-0.3x+20=0
We move all terms containing x to the left, all other terms to the right
-0.3x=-20
x=-20/-0.3
x=66+0.2/0.3
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