gayathrisarath6248 gayathrisarath6248

28-03-2020
Mathematics

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Kate is three years older than her sister. In two years Kate will be twice older. How old is Kate's sister now?

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conniechen2700 conniechen2700

28-03-2020

Answer:

Kate's sister is 5

Step-by-step explanation:

(k = kate's age)

(s = sister's age)

k = s + 3

k + 2 = 2s

Rearrange k + 2 = 2s into and plug it into the first equation

k = 2s - 2

2s - 2 = s + 3

2s - s = 3 + 2

s = 5

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