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-32=-7u+4(u-5)
We move all terms to the left:
-32-(-7u+4(u-5))=0
We calculate terms in parentheses: -(-7u+4(u-5)), so:We get rid of parentheses
-7u+4(u-5)
We multiply parentheses
-7u+4u-20
We add all the numbers together, and all the variables
-3u-20
Back to the equation:
-(-3u-20)
3u+20-32=0
We add all the numbers together, and all the variables
3u-12=0
We move all terms containing u to the left, all other terms to the right
3u=12
u=12/3
u=4
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