9=7-1x

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Solution for 9=7-1x equation: 



9=7-1x

We move all terms to the left:

9-(7-1x)=0

We add all the numbers together, and all the variables

-(-1x+7)+9=0

We get rid of parentheses

1x-7+9=0

We add all the numbers together, and all the variables

x+2=0

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

x=-2

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