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1=-5u+2(u+2)
We move all terms to the left:
1-(-5u+2(u+2))=0
We calculate terms in parentheses: -(-5u+2(u+2)), so:We get rid of parentheses
-5u+2(u+2)
We multiply parentheses
-5u+2u+4
We add all the numbers together, and all the variables
-3u+4
Back to the equation:
-(-3u+4)
3u-4+1=0
We add all the numbers together, and all the variables
3u-3=0
We move all terms containing u to the left, all other terms to the right
3u=3
u=3/3
u=1
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