20=1.25(1+x/120)

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Solution for 20=1.25(1+x/120) equation: 



20=1.25(1+x/120)

We move all terms to the left:

20-(1.25(1+x/120))=0

We add all the numbers together, and all the variables

-(1.25(x/120+1))+20=0

We multiply all the terms by the denominator


-(1.25(x+20*120+1))=0



We calculate terms in parentheses: -(1.25(x+20*120+1)), so:

1.25(x+20*120+1)

We add all the numbers together, and all the variables

1.25(x+2401)

We multiply parentheses

1.25x+3001.25

Back to the equation:

-(1.25x+3001.25)



We get rid of parentheses

-1.25x-3001.25=0

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

-1.25x=3001.25

x=3001.25/-1.25

x=-2401

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