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87=12x+25
We move all terms to the left:
87-(12x+25)=0
We get rid of parentheses
-12x-25+87=0
We add all the numbers together, and all the variables
-12x+62=0
We move all terms containing x to the left, all other terms to the right
-12x=-62
x=-62/-12
x=5+1/6
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