Vincent and Anna share some buttons.
710 of Vincent's buttons is equal to
713 of Anna's buttons. Given that Vincent has 21 buttons less than Anna, how many buttons do they have altogether?
710 of Vincent's buttons = 713 of Anna's buttons
Number of Vincent's buttons = 10 u
Number of Anna's buttons = 13 u
Number of buttons that Vincent has less than Anna
= 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
