540+4x=400+21x

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Solution for 540+4x=400+21x equation: 



540+4x=400+21x

We move all terms to the left:

540+4x-(400+21x)=0

We add all the numbers together, and all the variables

4x-(21x+400)+540=0

We get rid of parentheses

4x-21x-400+540=0

We add all the numbers together, and all the variables

-17x+140=0

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

-17x=-140

x=-140/-17

x=8+4/17

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