7=4-u

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Solution for 7=4-u equation:



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

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