3999=x+x(0.12)

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Solution for 3999=x+x(0.12) equation: 



3999=x+x(0.12)

We move all terms to the left:

3999-(x+x(0.12))=0



We calculate terms in parentheses: -(x+x(0.12)), so:

x+x(0.12)

We multiply parentheses

x+0.12x

We add all the numbers together, and all the variables

1.12x

Back to the equation:

-(1.12x)



We add all the numbers together, and all the variables

-(+1.12x)+3999=0

We get rid of parentheses

-1.12x+3999=0

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

-1.12x=-3999

x=-3999/-1.12

x=3570+0.59999999999945/1.12

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