5x-9=(-3x)+21

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Solution for 5x-9=(-3x)+21 equation: 



5x-9=(-3x)+21

We move all terms to the left:

5x-9-((-3x)+21)=0



We calculate terms in parentheses: -((-3x)+21), so:

(-3x)+21

We get rid of parentheses

-3x+21

Back to the equation:

-(-3x+21)



We get rid of parentheses

5x+3x-21-9=0

We add all the numbers together, and all the variables

8x-30=0

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

8x=30

x=30/8

x=3+3/4

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