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45-X=13X+31=45
We move all terms to the left:
45-X-(13X+31)=0
We add all the numbers together, and all the variables
-1X-(13X+31)+45=0
We get rid of parentheses
-1X-13X-31+45=0
We add all the numbers together, and all the variables
-14X+14=0
We move all terms containing X to the left, all other terms to the right
-14X=-14
X=-14/-14
X=1
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