-15.21=12.8+x

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Solution for -15.21=12.8+x equation: 



-15.21=12.8+x

We move all terms to the left:

-15.21-(12.8+x)=0

We add all the numbers together, and all the variables

-(x+12.8)-15.21=0

We get rid of parentheses

-x-12.8-15.21=0

We add all the numbers together, and all the variables

-1x-28.01=0

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

-x=28.01

x=28.01/-1

x=-28+0.010000000000002/1

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