Xuan bought
23 as many post-it pads as correction tapes at first. After she bought another 6 post-it pads and 31 correction tapes, there were
25 as many post-it pads as correction tapes. How many post-it pads and correction tapes did Xuan buy at first?
| |
Make p the same
(1)x5 = (3) |
Post-it Pads
(1) |
Correction Tapes
(2) |
Make p the same
(2)x2 = (4) |
| Before |
10 u |
2 u |
3 u |
6 u |
| Change |
+ 30 |
+ 6 |
+ 31 |
+ 62 |
| After |
10 p |
2 p |
5 p |
10 p |
Make p the same.
(3) = (4)
10 u + 30 = 6 u + 62
10 u - 6 u = 62 - 30
4 u = 32
1 u = 32 ÷ 4 = 8
Number of post-it pads and correction tapes that Xuan bought at first
= 2 u + 3 u
= 5 u
= 5 x 8
= 40
Answer(s): 40
