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(61-x)/13=4
We move all terms to the left:
(61-x)/13-(4)=0
We add all the numbers together, and all the variables
(-1x+61)/13-4=0
We multiply all the terms by the denominator
(-1x+61)-4*13=0
We add all the numbers together, and all the variables
(-1x+61)-52=0
We get rid of parentheses
-1x+61-52=0
We add all the numbers together, and all the variables
-1x+9=0
We move all terms containing x to the left, all other terms to the right
-x=-9
x=-9/-1
x=+9
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