20a+10(319-a)=(20+10)a

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Solution for 20a+10(319-a)=(20+10)a equation: 



20a+10(319-a)=(20+10)a

We move all terms to the left:

20a+10(319-a)-((20+10)a)=0

We add all the numbers together, and all the variables

20a+10(-1a+319)-(30a)=0

We add all the numbers together, and all the variables

-10a+10(-1a+319)=0

We multiply parentheses

-10a-10a+3190=0

We add all the numbers together, and all the variables

-20a+3190=0

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

-20a=-3190

a=-3190/-20

a=159+1/2

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