10+2x+18=21+x

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Solution for 10+2x+18=21+x equation: 



10+2x+18=21+x

We move all terms to the left:

10+2x+18-(21+x)=0

We add all the numbers together, and all the variables

2x-(x+21)+10+18=0

We add all the numbers together, and all the variables

2x-(x+21)+28=0

We get rid of parentheses

2x-x-21+28=0

We add all the numbers together, and all the variables

x+7=0

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

x=-7

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