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-2=2(u-2)-4u
We move all terms to the left:
-2-(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+4-2=0
We add all the numbers together, and all the variables
2u+2=0
We move all terms containing u to the left, all other terms to the right
2u=-2
u=-2/2
u=-1
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