what is -2=6/7p

P can be in numerator or denominator.

I'll solve it both ways:

-2 = (6/7)p = 6p/7
Multiply each side by 7:
-14 = 6p
p = -14/6 = - 7/3.

-2 = 6/7p
Multiply each side by 7p:
-14p = 6
p = - 6/14 = -3/7