720=200+280+4x

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Solution for 720=200+280+4x equation: 



720=200+280+4x

We move all terms to the left:

720-(200+280+4x)=0

We add all the numbers together, and all the variables

-(4x+480)+720=0

We get rid of parentheses

-4x-480+720=0

We add all the numbers together, and all the variables

-4x+240=0

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

-4x=-240

x=-240/-4

x=+60

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