Erika bought
34 as many post-it pads as correction tapes at first. After she bought another 5 post-it pads and 37 correction tapes, there were
25 as many post-it pads as correction tapes. How many post-it pads and correction tapes did Erika 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 |
4 u |
8 u |
| Change |
+ 25 |
+ 5 |
+ 37 |
+ 74 |
| After |
10 p |
2 p |
5 p |
10 p |
Make p the same.
(3) = (4)
15 u + 25 = 8 u + 74
15 u - 8 u = 74 - 25
7 u = 49
1 u = 49 ÷ 7 = 7
Number of post-it pads and correction tapes that Erika bought at first
= 3 u + 4 u
= 7 u
= 7 x 7
= 49
Answer(s): 49
