100-8x=120-12x

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Solution for 100-8x=120-12x equation: 



100-8x=120-12x

We move all terms to the left:

100-8x-(120-12x)=0

We add all the numbers together, and all the variables

-8x-(-12x+120)+100=0

We get rid of parentheses

-8x+12x-120+100=0

We add all the numbers together, and all the variables

4x-20=0

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

4x=20

x=20/4

x=5

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