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erica [24]
2 years ago
15

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

Mathematics
2 answers:
Dmitriy789 [7]2 years ago
5 0


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.
Nuetrik [128]2 years ago
3 0

Answer:

mk?

Step-by-step explanation:

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