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-21-2x=11-6x
We move all terms to the left:
-21-2x-(11-6x)=0
We add all the numbers together, and all the variables
-2x-(-6x+11)-21=0
We get rid of parentheses
-2x+6x-11-21=0
We add all the numbers together, and all the variables
4x-32=0
We move all terms containing x to the left, all other terms to the right
4x=32
x=32/4
x=8
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