Hi There!
Let the average lifespan of a tiger be t, and let the average lifespan of a lion be l.
Now, write the equation:
We know that t=17, and l = 17-3
Write the equation:
l=17-3
Solve:
l=14 (Average lifespan of a lion)
And we're done!
Hope it helps.
Have an awesome day!
[tex]\huge\text{TheStarryNights :D}[/tex]