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42=8x+4
We move all terms to the left:
42-(8x+4)=0
We get rid of parentheses
-8x-4+42=0
We add all the numbers together, and all the variables
-8x+38=0
We move all terms containing x to the left, all other terms to the right
-8x=-38
x=-38/-8
x=4+3/4
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