400-2.8x=121.2

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Solution for 400-2.8x=121.2 equation: 



400-2.8x=121.2

We move all terms to the left:

400-2.8x-(121.2)=0

We add all the numbers together, and all the variables

-2.8x+278.8=0

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

-2.8x=-278.8

x=-278.8/-2.8

x=99+1/1.75

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