7x-7=140

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Solution for 7x-7=140 equation: 



7x-7=140

We move all terms to the left:

7x-7-(140)=0

We add all the numbers together, and all the variables

7x-147=0

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

7x=147

x=147/7

x=21

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