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-5-4u=2-5u
We move all terms to the left:
-5-4u-(2-5u)=0
We add all the numbers together, and all the variables
-4u-(-5u+2)-5=0
We get rid of parentheses
-4u+5u-2-5=0
We add all the numbers together, and all the variables
u-7=0
We move all terms containing u to the left, all other terms to the right
u=7
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