(2x+10)-(x-4)=21

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Solution for (2x+10)-(x-4)=21 equation: 



(2x+10)-(x-4)=21

We move all terms to the left:

(2x+10)-(x-4)-(21)=0

We get rid of parentheses

2x-x+10+4-21=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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