20=10-9x

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Solution for 20=10-9x equation: 



20=10-9x

We move all terms to the left:

20-(10-9x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

9x-10+20=0

We add all the numbers together, and all the variables

9x+10=0

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

9x=-10

x=-10/9

x=-1+1/9

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