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36=7u+3(u+2)
We move all terms to the left:
36-(7u+3(u+2))=0
We calculate terms in parentheses: -(7u+3(u+2)), so:We get rid of parentheses
7u+3(u+2)
We multiply parentheses
7u+3u+6
We add all the numbers together, and all the variables
10u+6
Back to the equation:
-(10u+6)
-10u-6+36=0
We add all the numbers together, and all the variables
-10u+30=0
We move all terms containing u to the left, all other terms to the right
-10u=-30
u=-30/-10
u=+3
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