1) The number must be greater than at least 14. This is because the limit is 14 years older.
let Ishaan = y, Christopher = x. Set the system of equation
y = 3x
y = x + 14
Set the two equations equal to each other
3x = x + 14
Simplify. Note the equal sign, what you do to one side, you do to the other. Isolate the variable
3x (-x) = x (-x) + 14
3x - x = 14
2x = 14
(2x)/2 = (14)/2
x = 14/2
x = 7
Christopher is 7 years old, Ishaan is 21 years old.
Check:
7 x 3 = 21 (True)
7 + 14 = 21 (True)
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