21-2x=18-5x

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Solution for 21-2x=18-5x equation: 



21-2x=18-5x

We move all terms to the left:

21-2x-(18-5x)=0

We add all the numbers together, and all the variables

-2x-(-5x+18)+21=0

We get rid of parentheses

-2x+5x-18+21=0

We add all the numbers together, and all the variables

3x+3=0

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

3x=-3

x=-3/3

x=-1

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