(-7x)+(4x)=9

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Solution for (-7x)+(4x)=9 equation: 



(-7x)+(4x)=9

We move all terms to the left:

(-7x)+(4x)-(9)=0

We add all the numbers together, and all the variables

4x+(-7x)-9=0

We get rid of parentheses

4x-7x-9=0

We add all the numbers together, and all the variables

-3x-9=0

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

-3x=9

x=9/-3

x=-3

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