Y/6 - 3 = -11 state answer and gives steps.

 2.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  6  as the denominator :

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

 2.2       Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

 3.1   Subtracting a whole from a fraction

Rewrite the whole as a fraction using  6  as the denominator :

 3.2       Adding up the two equivalent fractions

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

Now, on the left hand side, the  6  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :
   y+48  = 0

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.