Let youngest = x
2nd youngest = x + 3
2nd oldest = x + 14
oldest = 20 + (x + x + 14)
2
= 20 + (2x+14)
2
= 20 + x + 7
= x + 27
Total of their ages = 384
Equation:
(x) + (x+3) + (x+14) + (x+27) = 384
4x + 44 = 384
4x = 384 - 44
4x = 340
4 4
x = 85
Their ages if x = 85
Youngest: x 85 yrs. old
2nd youngest : x + 3
85 + 3 = 88 years old
2nd oldest: x + 14
85 + 14 = 99 years old
Oldest: x + 27
85 + 27 = 112 years old
To check:
85 + 88 + 99 + 112 = 384
384 = 384