2 years ago

4.

Mathematics

1 answer:

oksano4ka [1.4K]2 years ago

7 0

Step-by-step explanation:

a = age of Alex

l = age of Lucy

m = age of Megan

a + l + m = 126

l = 3a

l = m + 7

a = l/3

m = l - 7

we are using that in the first equation :

l/3 + l + l - 7 = 126

l + 3l + 3l - 21 = 378

7l = 357

l = 357/7 = 51

a = l/3 = 51/3 = 17

m = l - 7 = 51 - 7 = 44

the ratio of the age of Lucy to Alex to Megan is

51 : 17 : 44

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