9x+21x+21x=51

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Solution for 9x+21x+21x=51 equation: 



9x+21x+21x=51

We move all terms to the left:

9x+21x+21x-(51)=0

We add all the numbers together, and all the variables

51x-51=0

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

51x=51

x=51/51

x=1

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