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6=2(u+1)-4
We move all terms to the left:
6-(2(u+1)-4)=0
We calculate terms in parentheses: -(2(u+1)-4), so:We get rid of parentheses
2(u+1)-4
We multiply parentheses
2u+2-4
We add all the numbers together, and all the variables
2u-2
Back to the equation:
-(2u-2)
-2u+2+6=0
We add all the numbers together, and all the variables
-2u+8=0
We move all terms containing u to the left, all other terms to the right
-2u=-8
u=-8/-2
u=+4
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