Problema Solution
grace is 12years older than her little brother.if the sum of their ages 3 years ago was 48,how old is grace and his brother now?
Answer provided by our tutors
let
g = the age of grace now
b = the age of her brother now
grace is 12 years older than her little brother
g = 12 + b
the sum of their ages 3 years ago was 48
g - 3 + b - 3 = 48
g + b - 6 = 48
g + b = 48 + 6
g + b = 54
by solving the system of equations
g = 12 + b
g + b = 54
we find
g = 33 years
b = 21 years
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grace is 33 years old now.
her brother is 21 years old now.