9x+4=21x-34=90

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Solution for 9x+4=21x-34=90 equation: 



9x+4=21x-34=90

We move all terms to the left:

9x+4-(21x-34)=0

We get rid of parentheses

9x-21x+34+4=0

We add all the numbers together, and all the variables

-12x+38=0

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

-12x=-38

x=-38/-12

x=3+1/6

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