400=3000+100x

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Solution for 400=3000+100x equation: 



400=3000+100x

We move all terms to the left:

400-(3000+100x)=0

We add all the numbers together, and all the variables

-(100x+3000)+400=0

We get rid of parentheses

-100x-3000+400=0

We add all the numbers together, and all the variables

-100x-2600=0

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

-100x=2600

x=2600/-100

x=-26

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