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45=13x+19
We move all terms to the left:
45-(13x+19)=0
We get rid of parentheses
-13x-19+45=0
We add all the numbers together, and all the variables
-13x+26=0
We move all terms containing x to the left, all other terms to the right
-13x=-26
x=-26/-13
x=+2
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