21+x=36-2x

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Solution for 21+x=36-2x equation: 



21+x=36-2x

We move all terms to the left:

21+x-(36-2x)=0

We add all the numbers together, and all the variables

x-(-2x+36)+21=0

We get rid of parentheses

x+2x-36+21=0

We add all the numbers together, and all the variables

3x-15=0

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

3x=15

x=15/3

x=5

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