9(x+1)-10x=21

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Solution for 9(x+1)-10x=21 equation: 



9(x+1)-10x=21

We move all terms to the left:

9(x+1)-10x-(21)=0

We add all the numbers together, and all the variables

-10x+9(x+1)-21=0

We multiply parentheses

-10x+9x+9-21=0

We add all the numbers together, and all the variables

-1x-12=0

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

-x=12

x=12/-1

x=-12

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