x+2+9=21+2x

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Solution for x+2+9=21+2x equation: 



x+2+9=21+2x

We move all terms to the left:

x+2+9-(21+2x)=0

We add all the numbers together, and all the variables

x-(2x+21)+2+9=0

We add all the numbers together, and all the variables

x-(2x+21)+11=0

We get rid of parentheses

x-2x-21+11=0

We add all the numbers together, and all the variables

-1x-10=0

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

-x=10

x=10/-1

x=-10

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