Respuesta :

tonb
Write this story as equations:

s = 5j
(s+12) = 2*(j+12)

Then solve:

5j+12 = 2j + 24 => 3j = 12 => j=4, s=5*4=20

Steve is 20, Janis is 4
In 12 years they will be 32 and 16

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