9x+21=5x-12

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Solution for 9x+21=5x-12 equation: 



9x+21=5x-12

We move all terms to the left:

9x+21-(5x-12)=0

We get rid of parentheses

9x-5x+12+21=0

We add all the numbers together, and all the variables

4x+33=0

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

4x=-33

x=-33/4

x=-8+1/4

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