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A father is three times as old as his son: f = 3s. The line f - s = 24 (age difference 24 years) is also drawn.
From the intersection of these two graphs, find the son's age (years).

Class 10Graphical MethodAlgebra — Systems of Equations
  • A11
  • B12
  • C24
  • D13

Step-by-Step Solution

Substitute f = 3s into f - s = 24: 3s - s = 24, 2s = 24, s = 12. The son is 12 years old.
Answer: B) 12

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