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21+8x=50+11x
We move all terms to the left:
21+8x-(50+11x)=0
We add all the numbers together, and all the variables
8x-(11x+50)+21=0
We get rid of parentheses
8x-11x-50+21=0
We add all the numbers together, and all the variables
-3x-29=0
We move all terms containing x to the left, all other terms to the right
-3x=29
x=29/-3
x=-9+2/3
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