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42+77=8x+13
We move all terms to the left:
42+77-(8x+13)=0
We add all the numbers together, and all the variables
-(8x+13)+119=0
We get rid of parentheses
-8x-13+119=0
We add all the numbers together, and all the variables
-8x+106=0
We move all terms containing x to the left, all other terms to the right
-8x=-106
x=-106/-8
x=13+1/4
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