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4x+21=11x-59
We move all terms to the left:
4x+21-(11x-59)=0
We get rid of parentheses
4x-11x+59+21=0
We add all the numbers together, and all the variables
-7x+80=0
We move all terms containing x to the left, all other terms to the right
-7x=-80
x=-80/-7
x=11+3/7
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