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-47=4(u-4)-15
We move all terms to the left:
-47-(4(u-4)-15)=0
We calculate terms in parentheses: -(4(u-4)-15), so:We get rid of parentheses
4(u-4)-15
We multiply parentheses
4u-16-15
We add all the numbers together, and all the variables
4u-31
Back to the equation:
-(4u-31)
-4u+31-47=0
We add all the numbers together, and all the variables
-4u-16=0
We move all terms containing u to the left, all other terms to the right
-4u=16
u=16/-4
u=-4
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