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85-2x=-30-9x
We move all terms to the left:
85-2x-(-30-9x)=0
We add all the numbers together, and all the variables
-2x-(-9x-30)+85=0
We get rid of parentheses
-2x+9x+30+85=0
We add all the numbers together, and all the variables
7x+115=0
We move all terms containing x to the left, all other terms to the right
7x=-115
x=-115/7
x=-16+3/7
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