3x-9=4x+40

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Solution for 3x-9=4x+40 equation: 



3x-9=4x+40

We move all terms to the left:

3x-9-(4x+40)=0

We get rid of parentheses

3x-4x-40-9=0

We add all the numbers together, and all the variables

-1x-49=0

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

-x=49

x=49/-1

x=-49

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