adrigie4cze adrigie4cze

01-10-2016
Mathematics

contestada

Today, the sum of the ages of Bea and her sister is 18. What would be the sum of their ages next year?

Respuesta :

01-10-2016

Hello,

Let's assume a the age of Bea
b the age of her sister

This year: a+b=18

Next year (a+1)+(b+1)=(a+b)+(1+1)=(a+b)+2=18+2=20

Answer Link

apologiabiology apologiabiology

01-10-2016

b=bea's age

sister+b=18
next years, both grew 1
sister+1+b+1=18+1+1=20

sum is 20

Answer Link

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