justaedulan justaedulan
  • 02-05-2021
  • Mathematics
contestada

yvonne is 3 years younger than her sister.the sum of thier ages is 25 years.​

Respuesta :

Mari2cute
Mari2cute Mari2cute
  • 02-05-2021

Answer:

mk?

Step-by-step explanation:

Answer Link
debmc7
debmc7 debmc7
  • 02-05-2021


Guessing you need to know how old each girl is. Yvonne is 11, her sister is 14.

s = sister
y = Yvonne
Yvonne is 3 years younger than her sister
y = s - 3
s + y = 25

So we’ll substitute the first equation into the second:

s + (s - 3) = 25 and solve for a numerical value for s
2s - 3 = 25
Add 3 to both sides:
2s = 28
s = 14

Yvonne is 3 years younger, so she is 11.
Answer Link

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