I NEED HELP FAST

Question

Yolanda's age is 5 years less than twice Marco's age. If Yolanda is 15 years old, how old is Marcus? Choose the answer below that is a viable solution to this problem.

 A.10

 B.8 

C.5

 D.1

Answer 1

Hello Keef!

Great Question! Let's use the first sentence real quick: "Yolanda's age is 5 years less than twice Marco's age". Since we don't know Yolanda's age (from this sentence) we need to create a quick math equation:

Yolanda's age = 2x - 5, where x is Marco's age.

The reason for this equation is that it say "5 years less", which we subtract 5, but from what exactly. Well, the next portion of the sentence says "twice Marco's Age" therefore, its 2x so we must subtract 5 from 2x. Later in the problem we are given Yolanda's age so our equation changes to this:

15 = 2x - 5 Now we just solve for x.

15 = 2x - 5 Add 5 to both sides.

+5 + 5

20 = 2x Divide by 2 on both sides

10 = x

As a result, Marcus is 10 years old. Hopefully this makes sense! Feel free to ask any questions!.