Respuesta :
Step-by-step explanation:
y = number of cards Roberto had in total
x = number of friends he is giving to the cards to
(a)
y = 32x
(b)
To find the number of cards he had in total, just plugin the number of friends he gave his cards to, which was 4 friends
y = 32x
y = 32(4)
y = 128
Roberto had 128 cards
Y=32(X), X and Y is your variable for any sort of Linear Equation
Y=32(4)
Y = 128