91-28=-9x+2x

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Solution for 91-28=-9x+2x equation: 



91-28=-9x+2x

We move all terms to the left:

91-28-(-9x+2x)=0

We add all the numbers together, and all the variables

-(-7x)+91-28=0

We add all the numbers together, and all the variables

-(-7x)+63=0

We get rid of parentheses

7x+63=0

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

7x=-63

x=-63/7

x=-9

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