-20-4x=-40-9x

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Solution for -20-4x=-40-9x equation: 



-20-4x=-40-9x

We move all terms to the left:

-20-4x-(-40-9x)=0

We add all the numbers together, and all the variables

-4x-(-9x-40)-20=0

We get rid of parentheses

-4x+9x+40-20=0

We add all the numbers together, and all the variables

5x+20=0

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

5x=-20

x=-20/5

x=-4

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