400=12x-80

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Solution for 400=12x-80 equation: 



400=12x-80

We move all terms to the left:

400-(12x-80)=0

We get rid of parentheses

-12x+80+400=0

We add all the numbers together, and all the variables

-12x+480=0

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

-12x=-480

x=-480/-12

x=+40

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