50=0.5(130-x)

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Solution for 50=0.5(130-x) equation: 



50=0.5(130-x)

We move all terms to the left:

50-(0.5(130-x))=0

We add all the numbers together, and all the variables

-(0.5(-1x+130))+50=0



We calculate terms in parentheses: -(0.5(-1x+130)), so:

0.5(-1x+130)

We multiply parentheses

-0.5x+65

Back to the equation:

-(-0.5x+65)



We get rid of parentheses

0.5x-65+50=0

We add all the numbers together, and all the variables

0.5x-15=0

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

0.5x=15

x=15/0.5

x=30

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