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I have two story problems.
1. Lucy is 4 years older than her neighbor. The sum of their ages is no more than 14 years. The oldest age that Lucy's neighbor could be is ___ years old.
2. Kat's father is 4 times as old as Kat. The sum of their ages is no less than 55. The youngest age Kat could be is ___ years old.

Respuesta :

nerdsquad
let lucy = l & neighbour= n
l = n +4
l + n= 14 years
substitute l with n +4
(n +4) + n = 14
2n +4 =14
n=5 years
l = n + 4 lets substitute n with 5
l = 5 + 4
lucy = 9 years
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