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-57.05=3.5x-4.2
We move all terms to the left:
-57.05-(3.5x-4.2)=0
We get rid of parentheses
-3.5x+4.2-57.05=0
We add all the numbers together, and all the variables
-3.5x-52.85=0
We move all terms containing x to the left, all other terms to the right
-3.5x=52.85
x=52.85/-3.5
x=-15+0.35/3.5
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