desireemoniqu desireemoniqu

23-06-2018
Mathematics

contestada

the sum of the ages of josh and autumn is 88 years 9 years ago josh was 4 times autumn age how old is josh now

Respuesta :

calculista calculista

02-07-2018

let
x---------> josh"age
y--------> autumn' age

we know that
x+y=88--------> y=88-x---------> equation 1
(x-9)=4*(y-9)--------> equation 2

substitute equation 1 in equation 2
(x-9)=4*(88-x-9)
x-9=4*(79-x)
x-9=316-4x
x+4x=316+9
5x=325
x=65

the answer is
josh"age is 65 years

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