Reggie and Lucy share some buttons.
710 of Reggie's buttons is equal to
713 of Lucy's buttons. Given that Lucy has 21 buttons more than Reggie, how many buttons do they have altogether?
710 of Reggie's buttons = 713 of Lucy's buttons
Number of Reggie's buttons = 10 u
Number of Lucy's buttons = 13 u
Number of buttons that Lucy has more than Reggie
= 13 u - 10 u
= 3 u
3 u = 21
1 u = 21 ÷ 3 = 7
Total number of buttons
= 10 u + 13 u
= 23 u
= 23 x 7
= 161
Answer(s): 161
