21-5x=13-9x

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Solution for 21-5x=13-9x equation: 



21-5x=13-9x

We move all terms to the left:

21-5x-(13-9x)=0

We add all the numbers together, and all the variables

-5x-(-9x+13)+21=0

We get rid of parentheses

-5x+9x-13+21=0

We add all the numbers together, and all the variables

4x+8=0

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

4x=-8

x=-8/4

x=-2

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