20.5=x-4

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Solution for 20.5=x-4 equation: 



20.5=x-4

We move all terms to the left:

20.5-(x-4)=0

We get rid of parentheses

-x+4+20.5=0

We add all the numbers together, and all the variables

-1x+24.5=0

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

-x=-24.5

x=-24.5/-1

x=24+0.5/1

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