A plant has an initial height of 7 inches and grows at a constant rate of 3 inches each year. A second plant that also grows at a constant rate has an initial height of 2 inches and is 14 inches tall after 3 years. After how many years are the plants the same height?

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.

answer:   y=2x-3

step-by-step explanation: