Question

William says that 15 yeas from now, his age will be 3 times his age 5 years ago. If x x represents William present age, complete the following sentence

A 15 years
B 18 years
C x-15=3(x-5)
D x+15=3(x-5)

Answer 1

D,

Explanation:

x is the present age of William, 15 years from now is x+15, and that is equal to 3 times 3() the age he had 5 years ago (x-5)., the equation is x+15=3(x-5)

Answer 2

I don't know what the following sentence is:

But D is the equation to represent the situation

and A is what turns out to be his current age.

(If you want more help, on this question please post the following sentence).

Explanation:

Let x represent the current age.

15 years from now his age is 3 times his age 5 years ago means we have the equation:

x+15=3(x-5)

(I added x to 15 because we said 15 years in the future)

Let's solve this to see if makes any sense just for fun:

Distribute:

x+15=3x-15

Add 15 on both sides:

x+30=3x

Subtract x on both sides:

30=2x

Divide both sides by 2:

15=x

So this means his current age is 15.

5 years ago his age would have been 10.

15 years in the future his age will be 30.

Is 30 equal to 3 times 10? Yes, it is! The equation does make sense.