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45-9x=13+7x
We move all terms to the left:
45-9x-(13+7x)=0
We add all the numbers together, and all the variables
-9x-(7x+13)+45=0
We get rid of parentheses
-9x-7x-13+45=0
We add all the numbers together, and all the variables
-16x+32=0
We move all terms containing x to the left, all other terms to the right
-16x=-32
x=-32/-16
x=+2
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