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

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



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

We move all terms to the left:

(20-10x)+(9x)-(180)=0

We add all the numbers together, and all the variables

(-10x+20)+9x-180=0

We add all the numbers together, and all the variables

9x+(-10x+20)-180=0

We get rid of parentheses

9x-10x+20-180=0

We add all the numbers together, and all the variables

-1x-160=0

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

-x=160

x=160/-1

x=-160

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