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5x+300-45=8x-300
We move all terms to the left:
5x+300-45-(8x-300)=0
We add all the numbers together, and all the variables
5x-(8x-300)+255=0
We get rid of parentheses
5x-8x+300+255=0
We add all the numbers together, and all the variables
-3x+555=0
We move all terms containing x to the left, all other terms to the right
-3x=-555
x=-555/-3
x=+185
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