30=(12+x)+(1.57x)

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Solution for 30=(12+x)+(1.57x) equation: 



30=(12+x)+(1.57x)

We move all terms to the left:

30-((12+x)+(1.57x))=0

We add all the numbers together, and all the variables

-((x+12)+(+1.57x))+30=0



We calculate terms in parentheses: -((x+12)+(+1.57x)), so:

(x+12)+(+1.57x)

We get rid of parentheses

x+1.57x+12

We add all the numbers together, and all the variables

2.57x+12

Back to the equation:

-(2.57x+12)



We get rid of parentheses

-2.57x-12+30=0

We add all the numbers together, and all the variables

-2.57x+18=0

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

-2.57x=-18

x=-18/-2.57

x=7+0.010000000000002/2.57

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