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(5x+13)+x=140
We move all terms to the left:
(5x+13)+x-(140)=0
We add all the numbers together, and all the variables
x+(5x+13)-140=0
We get rid of parentheses
x+5x+13-140=0
We add all the numbers together, and all the variables
6x-127=0
We move all terms containing x to the left, all other terms to the right
6x=127
x=127/6
x=21+1/6
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