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-18u=6.84-17.4u
We move all terms to the left:
-18u-(6.84-17.4u)=0
We add all the numbers together, and all the variables
-18u-(-17.4u+6.84)=0
We get rid of parentheses
-18u+17.4u-6.84=0
We add all the numbers together, and all the variables
-0.6u-6.84=0
We move all terms containing u to the left, all other terms to the right
-0.6u=6.84
u=6.84/-0.6
u=-11+0.24/0.6
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