7x-100=100-3x

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Solution for 7x-100=100-3x equation: 



7x-100=100-3x

We move all terms to the left:

7x-100-(100-3x)=0

We add all the numbers together, and all the variables

7x-(-3x+100)-100=0

We get rid of parentheses

7x+3x-100-100=0

We add all the numbers together, and all the variables

10x-200=0

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

10x=200

x=200/10

x=20

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