(10y-9)=(20y+9)=180

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Solution for (10y-9)=(20y+9)=180 equation: 



(10y-9)=(20y+9)=180

We move all terms to the left:

(10y-9)-((20y+9))=0

We get rid of parentheses

10y-((20y+9))-9=0



We calculate terms in parentheses: -((20y+9)), so:

(20y+9)

We get rid of parentheses

20y+9

Back to the equation:

-(20y+9)



We get rid of parentheses

10y-20y-9-9=0

We add all the numbers together, and all the variables

-10y-18=0

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

-10y=18

y=18/-10

y=-1+4/5

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