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

Question

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

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Mathematics
3 years
2021-08-24T22:04:03+00:00
2021-08-24T22:04:03+00:00 2 Answers
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## Answers ( )

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:mk?

Step-by-step explanation: