contestada

Donna is 12 years yoinger than her brother. In 2 years, she will be 14 years morw than half as cold as her brother. How old each now?

Respuesta :

iiMGii
Let's solve this problem step-by-step.

STEP-BY-STEP EXPLANATION:

We will be using simultaneous equations to solve this problem.

We will convert the information from the problem into two equations as displayed below:

Let Donna = D

Let Donna's brother = B

Equation No. 1 -

D = B - 12

Equation No. 2 -

D + 2 = B / 2 + 14

To begin with, we will substitute the value of ( D ) from the first equation into the second equation to solve for ( B ).

Equation No. 2 -

D + 2 = B / 2 + 14

( B - 12 ) + 2 = B / 2 + 14

B - 10 = B / 2 + 14

B - B / 2 = 14 + 10

B / 2 = 24

B = 24 × 2

B = 48

From this, we will substitute the value of ( B ) from the second half into the first equation to solve for the value of ( D ).

Equation No. 1 -

D = B - 12

D = ( 48 ) - 12

D = 36

FINAL ANSWER:

Therefore, Donna is 36 years old and Donna's brother is 48 years old.

Hope this helps! :)
Have a lovely day! <3

Otras preguntas