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85=0.4x+82
We move all terms to the left:
85-(0.4x+82)=0
We get rid of parentheses
-0.4x-82+85=0
We add all the numbers together, and all the variables
-0.4x+3=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-3
x=-3/-0.4
x=7+0.2/0.4
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