100-3x=84-x

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Solution for 100-3x=84-x equation: 



100-3x=84-x

We move all terms to the left:

100-3x-(84-x)=0

We add all the numbers together, and all the variables

-3x-(-1x+84)+100=0

We get rid of parentheses

-3x+1x-84+100=0

We add all the numbers together, and all the variables

-2x+16=0

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

-2x=-16

x=-16/-2

x=+8

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