2.5=x-(-20)

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Solution for 2.5=x-(-20) equation: 



2.5=x-(-20)

We move all terms to the left:

2.5-(x-(-20))=0



We calculate terms in parentheses: -(x-(-20)), so:

x-(-20)

We add all the numbers together, and all the variables

x+20

Back to the equation:

-(x+20)



We get rid of parentheses

-x-20+2.5=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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