20x+9=13x-12

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Solution for 20x+9=13x-12 equation: 



20x+9=13x-12

We move all terms to the left:

20x+9-(13x-12)=0

We get rid of parentheses

20x-13x+12+9=0

We add all the numbers together, and all the variables

7x+21=0

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

7x=-21

x=-21/7

x=-3

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