Whats the fraction in simplest form- 9/12

The question ask to convert the said fraction in to its simplest form, according the mathematical law of fraction, in converting the said fraction in to its simpler form, you must first get the Greatest Common Factor of the numerator and the denominator and base on that, the simplest form of it is -3/4. I hope this would help 

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

the value of x is equal to 0.