D. Three less than five times the quantity of a number plus two.
Answer:
For each of the possible outcomes add the numbers on the two dice and count how many times this sum is 7. If you do so you will find that the sum is 7 for 6 of the possible outcomes. Thus the sum is a 7 in 6 of the 36 outcomes and hence the probability of rolling a 7 is 6/36 = 1/6
Minus 9 from both sides
7x = 49
X = 7
The number solution set 2 . 30 36
