Respuesta :
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:
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
