Question

Lai Yee and Khadijah have 60 stamps. When Lai Yee gives 5 stamps to Khadijah, the
number of Lai Yee’s stamps is twice the number of Khadijah’s stamps. How many
stamps does each of them have at first?
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Answer 1

Respuesta:

Lai Yee = 45 stamps

Lai Yee = 45 stampsKhadijah = 15 stamps

Explicación paso a paso:

l + k = 60 entonces l = 60 - k

l - 5 = 2(k + 5)

reemplazando

60 - k - 5 = 2k +10

60 - 5 - 10 = 2k + k

45 = 3k

45 : 3 = k

15 = k

entonces

l = 60 - 15 = 45