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11x-21=17-8x+21
We move all terms to the left:
11x-21-(17-8x+21)=0
We add all the numbers together, and all the variables
11x-(-8x+38)-21=0
We get rid of parentheses
11x+8x-38-21=0
We add all the numbers together, and all the variables
19x-59=0
We move all terms containing x to the left, all other terms to the right
19x=59
x=59/19
x=3+2/19
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