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30=6u+4(u+3)
We move all terms to the left:
30-(6u+4(u+3))=0
We calculate terms in parentheses: -(6u+4(u+3)), so:We get rid of parentheses
6u+4(u+3)
We multiply parentheses
6u+4u+12
We add all the numbers together, and all the variables
10u+12
Back to the equation:
-(10u+12)
-10u-12+30=0
We add all the numbers together, and all the variables
-10u+18=0
We move all terms containing u to the left, all other terms to the right
-10u=-18
u=-18/-10
u=1+4/5
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