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13=63-4x
We move all terms to the left:
13-(63-4x)=0
We add all the numbers together, and all the variables
-(-4x+63)+13=0
We get rid of parentheses
4x-63+13=0
We add all the numbers together, and all the variables
4x-50=0
We move all terms containing x to the left, all other terms to the right
4x=50
x=50/4
x=12+1/2
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