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76=28+6u
We move all terms to the left:
76-(28+6u)=0
We add all the numbers together, and all the variables
-(6u+28)+76=0
We get rid of parentheses
-6u-28+76=0
We add all the numbers together, and all the variables
-6u+48=0
We move all terms containing u to the left, all other terms to the right
-6u=-48
u=-48/-6
u=+8
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