Select the correct answer.

Gregory's age is 5 years greater than [tex]$\frac{1}{3}$[/tex] of Amanda's age. Gregory is 17 years old. If Amanda's age is denoted by [tex]$x$[/tex], which equation represents this situation and how old is Amanda?

A. The equation is [tex]$\frac{1}{3}(x+5)=17$[/tex]. Amanda is 46 years old.
B. The equation is [tex]$\frac{1}{3} x+5=17$[/tex]. Amanda is 36 years old.
C. The equation is [tex]$x+\frac{1}{3} x+5=17$[/tex]. Amanda is 9 years old.
D. The equation is [tex]$x+\frac{1}{3}+5=17$[/tex]. Amanda is 12 years old.



Answer :

Let's solve this problem step by step.

We are given that Gregory's age is 5 years greater than [tex]\(\frac{1}{3}\)[/tex] of Amanda's age. Gregory is 17 years old.

First, let's denote Amanda's age by [tex]\(x\)[/tex].

According to the provided information, we can set up the following equation:

[tex]\[ \frac{1}{3} x + 5 = 17 \][/tex]

This equation states that one-third of Amanda's age plus 5 years equals 17 years (Gregory's age).

We will solve this equation to find Amanda's age:

1. Start with the equation:
[tex]\[ \frac{1}{3} x + 5 = 17 \][/tex]

2. Subtract 5 from both sides of the equation to isolate the term with [tex]\(x\)[/tex]:
[tex]\[ \frac{1}{3} x = 12 \][/tex]

3. To solve for [tex]\(x\)[/tex], multiply both sides of the equation by 3:
[tex]\[ x = 12 \times 3 \][/tex]

4. Calculate the result:
[tex]\[ x = 36 \][/tex]

Therefore, Amanda is 36 years old.

Let's verify the given multiple choice options:

A. The equation is [tex]\(\frac{1}{3}(x+5)=17\)[/tex]. Amanda is 46 years old.
B. The equation is [tex]\(\frac{1}{3} x+5=17\)[/tex]. Amanda is 36 years old.
C. The equation is [tex]\(x+\frac{1}{3} x+5=17\)[/tex]. Amanda is 9 years old.
D. The equation is [tex]\(x+\frac{1}{3}+5=17\)[/tex]. Amanda is 12 years old.

The correct option here is:

B. The equation is [tex]\(\frac{1}{3} x+5=17\)[/tex]. Amanda is 36 years old.