21=10-2x

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Solution for 21=10-2x equation: 



21=10-2x

We move all terms to the left:

21-(10-2x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

2x-10+21=0

We add all the numbers together, and all the variables

2x+11=0

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

2x=-11

x=-11/2

x=-5+1/2

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