9x-5=21x+4

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Solution for 9x-5=21x+4 equation: 



9x-5=21x+4

We move all terms to the left:

9x-5-(21x+4)=0

We get rid of parentheses

9x-21x-4-5=0

We add all the numbers together, and all the variables

-12x-9=0

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

-12x=9

x=9/-12

x=-3/4

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