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(10x+45)+65=180
We move all terms to the left:
(10x+45)+65-(180)=0
We add all the numbers together, and all the variables
(10x+45)-115=0
We get rid of parentheses
10x+45-115=0
We add all the numbers together, and all the variables
10x-70=0
We move all terms containing x to the left, all other terms to the right
10x=70
x=70/10
x=7
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