21+8x=30+5x

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Solution for 21+8x=30+5x equation: 



21+8x=30+5x

We move all terms to the left:

21+8x-(30+5x)=0

We add all the numbers together, and all the variables

8x-(5x+30)+21=0

We get rid of parentheses

8x-5x-30+21=0

We add all the numbers together, and all the variables

3x-9=0

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

3x=9

x=9/3

x=3

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