Question

Richard owned n cows.

Ellis had exactly 4 times as many cows as Richard.
Richard buys 13 extra cows.
Ellis sells 9 of his cows.
Ellis still has more cows than Richard.
Form an inequality, in terms of n.
Solve the inequality to find the least value of n.
You must show all your working.

Answer 1

Richard has (n)
Ellis has (4n)
Richard now has (n+13)
Ellis now has (4n-9)
Ellis has more cows that Richard
That means
4n-9 > n+ 13
3n > 22
n > 22/3

Hope this helps.