9=7x+13

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Solution for 9=7x+13 equation: 



9=7x+13

We move all terms to the left:

9-(7x+13)=0

We get rid of parentheses

-7x-13+9=0

We add all the numbers together, and all the variables

-7x-4=0

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

-7x=4

x=4/-7

x=-4/7

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