12.50-x=30

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Solution for 12.50-x=30 equation: 



12.50-x=30

We move all terms to the left:

12.50-x-(30)=0

We add all the numbers together, and all the variables

-1x-17.5=0

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

-x=17.5

x=17.5/-1

x=-17+0.5/1

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