D. Write an original equation and solve.
Eight fewer than twice the sum of x and 4 is 10.

2(x+4) - 8 = 10

Step-by-step explanation:

the sum of x and 4: x+4

twice the sum of x and 4: 2(x+4)

eight fewer than twice the sum of x and 4: 2(x+4) - 8

eight fewer than twice the sum of x and 4 is 10: 2(x+4) - 8 = 10

1.)since the total weight is 35 3/4 pounds and 1/8 of that is unripe, by multiplying 35 3/4 with 1/8 you would find the weight of the grapefruit. 

2.) the number was the weight of the  unripe grapefruit, and you want to find the ripe ones weight. subtract the weight found from the total weight and you will find the weight of the remaining ripe grapefruits.

sorry its so wordy