mgaud2786
02.10.2019 •
Mathematics
Jane is 3 years older than mary, and mary is twice as old as kay. if kay is x years old, how old is jane?
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Ответ:
2x +3 years old is Jane
Step-by-step explanation:
As per the statement:
If Kay is x years old.
Mary is twice as old as Kay.
then;
Mary = 2x years old
It is also given that Jane is 3 years older than mary
⇒ Jane = 2x + 3
Therefore, 2x +3 years old is Jane
Ответ:
x - Kay's age
y - Jane's age
m - Mary's age
Jane is 3 years older than Mary: y = m + 3
Mary is twice as old as Kay: m = 2x
y = m + 3
m = 2x
Substitute m in the first equation:
y = 2x + 3
Ответ:
divide the amounts
Step-by-step explanation: