12.5-x=7.8

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Solution for 12.5-x=7.8 equation: 



12.5-x=7.8

We move all terms to the left:

12.5-x-(7.8)=0

We add all the numbers together, and all the variables

-1x+4.7=0

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

-x=-4.7

x=-4.7/-1

x=4+0.7/1

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