7x+x-20=140

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Solution for 7x+x-20=140 equation: 



7x+x-20=140

We move all terms to the left:

7x+x-20-(140)=0

We add all the numbers together, and all the variables

8x-160=0

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

8x=160

x=160/8

x=20

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