2x-(21+x)=-3

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Solution for 2x-(21+x)=-3 equation: 



2x-(21+x)=-3

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

2x-x-21+3=0

We add all the numbers together, and all the variables

x-18=0

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

x=18

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