-3=-7+u

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Solution for -3=-7+u equation:



-3=-7+u
We move all terms to the left:
-3-(-7+u)=0
We add all the numbers together, and all the variables
-(u-7)-3=0
We get rid of parentheses
-u+7-3=0
We add all the numbers together, and all the variables
-1u+4=0
We move all terms containing u to the left, all other terms to the right
-u=-4
u=-4/-1
u=+4

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