x+21+2x=(-12)-2x-17

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Solution for x+21+2x=(-12)-2x-17 equation: 



x+21+2x=(-12)-2x-17

We move all terms to the left:

x+21+2x-((-12)-2x-17)=0

We add all the numbers together, and all the variables

3x-((-12)-2x-17)+21=0



We calculate terms in parentheses: -((-12)-2x-17), so:

(-12)-2x-17

determiningTheFunctionDomain
-2x-17+(-12)

We add all the numbers together, and all the variables

-2x-29

Back to the equation:

-(-2x-29)



We get rid of parentheses

3x+2x+29+21=0

We add all the numbers together, and all the variables

5x+50=0

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

5x=-50

x=-50/5

x=-10

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