Determine whether the equation is a conditional equation, an identity, or a contradiction

Determine whether the equation is a conditional equation, an identity, or a contradiction.

y - 12 + 3y = 2y + 4

a. Conditional

b. Identity

c. Contradiction

An open box is formed from a rectangular piece of cardboard that is 5in longer than it is wide, by removing squares of side 4in from each corner and folding up the sides. If the volume of the carton is then 336 in^3, what were the dimensions of the original piece of cardboard?

Select one:

a. 15 in. by 20 in.

b. 7 in. by 12 in.

c. 11 in. by 16 in.

d. 19 in. by 24 in.