Question

Jenny starts a game with twice as many marbles as Keiko. Jenny gives keiko 5 marbles, but she still has 10 more than keiko. How many marbles did Jenny have to start with

Answer 1

Jenny has 40 marbles and Keiko has 20. When Jenny gives Keiko 5 of her marbles, now Jenny has 35 marbles and Keiko has 25. Jenny had twice as many marbles at first with 40 and after giving 5 to Keiko, Jenny has 10 more then Keiko. So answer is 40!

Answer 2

Answer:

Jenny has to start with 30 marbles.

Step-by-step explanation:

Let Keiko has the number of marbles = x

"Jenny starts the game with twice as many marbles as Keiko".

So Jenny will have the marbles = 2x

"Jenny gives 5 marbles to Keiko but she still has 10 more than Keiko".

2x - 5 = x + 10

2x - x = 10 + 5

x = 15

So Jenny have to start with 2x = 2×15 = 30 marbles