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-16=2(u+2)-4u
We move all terms to the left:
-16-(2(u+2)-4u)=0
We calculate terms in parentheses: -(2(u+2)-4u), so:We get rid of parentheses
2(u+2)-4u
We add all the numbers together, and all the variables
-4u+2(u+2)
We multiply parentheses
-4u+2u+4
We add all the numbers together, and all the variables
-2u+4
Back to the equation:
-(-2u+4)
2u-4-16=0
We add all the numbers together, and all the variables
2u-20=0
We move all terms containing u to the left, all other terms to the right
2u=20
u=20/2
u=10
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