Gem bought
35 as many post-it pads as correction tapes at first. After she bought another 9 post-it pads and 40 correction tapes, there were
25 as many post-it pads as correction tapes. How many post-it pads and correction tapes did Gem 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 |
15 u |
3 u |
5 u |
10 u |
| Change |
+ 45 |
+ 9 |
+ 40 |
+ 80 |
| After |
10 p |
2 p |
5 p |
10 p |
Make p the same.
(3) = (4)
15 u + 45 = 10 u + 80
15 u - 10 u = 80 - 45
5 u = 35
1 u = 35 ÷ 5 = 7
Number of post-it pads and correction tapes that Gem bought at first
= 3 u + 5 u
= 8 u
= 8 x 7
= 56
Answer(s): 56
