if x = 3, solve for y.\ny = 2·3^x\nfirst plug in the value of x into the equation.\ny = 2·3?

Explanation:

Step1: Substitute x value

Substitute (x = 3) into (y=2\cdot3^{x}), so (y = 2\cdot3^{3}).

Step2: Calculate (3^{3})

(3^{3}=3\times3\times3 = 27).

Step3: Calculate y

(y=2\times27 = 54).

Answer:

54