121-4x=9

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Solution for 121-4x=9 equation: 



121-4x=9

We move all terms to the left:

121-4x-(9)=0

We add all the numbers together, and all the variables

-4x+112=0

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

-4x=-112

x=-112/-4

x=+28

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