-3x+9=4x-75

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Solution for -3x+9=4x-75 equation: 



-3x+9=4x-75

We move all terms to the left:

-3x+9-(4x-75)=0

We get rid of parentheses

-3x-4x+75+9=0

We add all the numbers together, and all the variables

-7x+84=0

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

-7x=-84

x=-84/-7

x=+12

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