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(65)=78.5x-392.5
We move all terms to the left:
(65)-(78.5x-392.5)=0
We get rid of parentheses
-78.5x+392.5+65=0
We add all the numbers together, and all the variables
-78.5x+457.5=0
We move all terms containing x to the left, all other terms to the right
-78.5x=-457.5
x=-457.5/-78.5
x=5+5/6.0384615384615
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