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

determiningTheFunctionDomain
7x-140+(-7)=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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