Answer:
g=12
Step-by-step explanation:
4(2y)=24
8y=24
y=3
Since we know the value of y we substitude
36=3g
g=12
Answer: it's impossible to obtain 78
Step-by-step explanation: Since the calculator can double any number or permute its digits except 0
starting with number 1
1, 2, 4, 8, 16, 32, 64, 128
Therefore, it's impossible to obtain 78 by a series of these operations