Cole had
79 as many buttons as Xandra. After Cole bought another 28 buttons, he had 12 less buttons than Xandra. How many buttons did Cole have at first?
|
Cole |
Xandra |
Before |
7 u |
9 u |
Change |
+ 28 |
|
After |
7 u + 28 |
9 u |
Xandra had 12 more buttons than Cole in the end. So, if Cole had another 12 buttons, he would have the same number of buttons as Xandra.
9 u = 7 u + 28 + 12
9 u - 7 u = 28 + 12
2 u = 40
1 u = 40 ÷ 2 = 20
Number of buttons that Cole had at first
= 7 u
= 7 x 20
= 140
Answer: 140