Question

Enny’s mother is 5 years older than twice Jenny's age. The sum of their ages is 62 years. This is represented by the equation x + 2x + 5 = 62, where x is Jenny’s age.
Plug in the values from the set {12, 15, 18, 19} to find the value of x. The value that holds true for the equation is . So, Jenny is years old and her mother is years old.

Answer 1

Answer:

Jenny´s age is 19 and her mother is 43.

Step-by-step explanation:

1. Plug in the first value of the set:

$x=12$

$x+2x+5=62$

$12+2*12+5=62$

$12+24+5=62$

$41=62$

41 is different from 62, so Jenny isn´t 12 years old.

2. Plug in the second value of the set:

$x=15$

$x+2x+5=62$

$15+2*15+5=62$

$15+30+5=62$

$50=62$

50 is different from 62, so Jenny isn´t 15 years old.

3. Plug in the third value of the set:

$x=18$

$x+2x+5=62$

$18+2*18+5=62$

$18+36+5=62$

$=59$

59 is different from 62, so Jenny isn´t 18 years old.

4. Plug in the fourth value of the set:

$x=19$

$x+2x+5=62$

$19+2*19+5=62$

$19+38+5=62$

$62=62$

Therefore Jenny´s 19 years old.

5. Calculate Jenny´s mother age:

As the sum of their ages is 62 ages, we have the following equation:

$x+y=62$

where

x=Jenny´s age

y=Jenny´s mother age

Replacing the Jenny´s age we have:

$19+y=62$

Solving for y:

$y=62-19$

$y=43$

Therefore Jenny's mother age is 43 years old.

Answer 2

X + 2x + 5 = 62 which can be turned into.
3x + 5 = 62 
      -5      -5 now we subtract 5 from each side
3x = 57
/3     /3 now we divide 3 from each side to get...
x = 19.
Now to check 19 + (2 x 19) + 5 does in fact equal 62.  Jenny is 19 years old.  Hope this helped.