7x+6x-20=100-7x

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Solution for 7x+6x-20=100-7x equation: 



7x+6x-20=100-7x

We move all terms to the left:

7x+6x-20-(100-7x)=0

We add all the numbers together, and all the variables

7x+6x-(-7x+100)-20=0

We add all the numbers together, and all the variables

13x-(-7x+100)-20=0

We get rid of parentheses

13x+7x-100-20=0

We add all the numbers together, and all the variables

20x-120=0

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

20x=120

x=120/20

x=6

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