43=7-9u

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Solution for 43=7-9u equation: 



43=7-9u

We move all terms to the left:

43-(7-9u)=0

We add all the numbers together, and all the variables

-(-9u+7)+43=0

We get rid of parentheses

9u-7+43=0

We add all the numbers together, and all the variables

9u+36=0

We move all terms containing u to the left, all other terms to the right

9u=-36

u=-36/9

u=-4

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