juliacolton12 juliacolton12
  • 23-09-2019
  • Mathematics
contestada

Lori is three times as old as Michelle. In five years Michelle's age will be one half of Lori's age. How old are Lori and Michelle now?

Respuesta :

calculista
calculista calculista
  • 24-09-2019

Answer:

Lori's age is 15 years old and Michelle's age is 5 years old now

Step-by-step explanation:

Let

x-----> Lori's age

y ----> Michelle's age

we know that

[tex]x=3y[/tex]-----> equation A

[tex](y+5)=\frac{1}{2}(x+5)[/tex] ----> equation B

substitute equation A in equation B and solve for y

[tex](y+5)=\frac{1}{2}(3y+5)[/tex]

[tex]2y+10=(3y+5)[/tex]

[tex]3y-2y=10-5[/tex]

[tex]y=5[/tex]

Find the value of x

[tex]x=3(5)=15[/tex]

therefore

Lori's age is 15 years old and Michelle's age is 5 years old now

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