In each of the following, use any three of the numbers, 3, 9, 4, 8, 12, to make a correct number sentence. Each number can only be used once.

(19−___ ) × (___ − ___ ) = 75

a) 4, 8, 3

b) 3, 4 ,12

c) 12, 8 ,4

d) 12, 8 ,3