9x-7=128

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Solution for 9x-7=128 equation: 



9x-7=128

We move all terms to the left:

9x-7-(128)=0

We add all the numbers together, and all the variables

9x-135=0

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

9x=135

x=135/9

x=15

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