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-6=u/4+2
We move all terms to the left:
-6-(u/4+2)=0
We get rid of parentheses
-u/4-2-6=0
We multiply all the terms by the denominator
-u-2*4-6*4=0
We add all the numbers together, and all the variables
-1u-32=0
We move all terms containing u to the left, all other terms to the right
-u=32
u=32/-1
u=-32
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