4x+500=5x+400

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Solution for 4x+500=5x+400 equation: 



4x+500=5x+400

We move all terms to the left:

4x+500-(5x+400)=0

We get rid of parentheses

4x-5x-400+500=0

We add all the numbers together, and all the variables

-1x+100=0

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

-x=-100

x=-100/-1

x=+100

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