9x+40=4x-15

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Solution for 9x+40=4x-15 equation: 



9x+40=4x-15

We move all terms to the left:

9x+40-(4x-15)=0

We get rid of parentheses

9x-4x+15+40=0

We add all the numbers together, and all the variables

5x+55=0

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

5x=-55

x=-55/5

x=-11

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