13=7-2u

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Solution for 13=7-2u equation:



13=7-2u
We move all terms to the left:
13-(7-2u)=0
We add all the numbers together, and all the variables
-(-2u+7)+13=0
We get rid of parentheses
2u-7+13=0
We add all the numbers together, and all the variables
2u+6=0
We move all terms containing u to the left, all other terms to the right
2u=-6
u=-6/2
u=-3

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