The temperature of the ocean water dropped 4 degrees every hour. After 12 hours, what was the change in the water temperature

i think it might be a but you might want a second opinion

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.