9x+21-2x=128

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Solution for 9x+21-2x=128 equation: 



9x+21-2x=128

We move all terms to the left:

9x+21-2x-(128)=0

We add all the numbers together, and all the variables

7x-107=0

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

7x=107

x=107/7

x=15+2/7

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