5x-100=20-7x

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Solution for 5x-100=20-7x equation: 



5x-100=20-7x

We move all terms to the left:

5x-100-(20-7x)=0

We add all the numbers together, and all the variables

5x-(-7x+20)-100=0

We get rid of parentheses

5x+7x-20-100=0

We add all the numbers together, and all the variables

12x-120=0

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

12x=120

x=120/12

x=10

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