4-x=7.8

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Solution for 4-x=7.8 equation: 



4-x=7.8

We move all terms to the left:

4-x-(7.8)=0

We add all the numbers together, and all the variables

-1x-3.8=0

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

-x=3.8

x=3.8/-1

x=-3+0.8/1

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