Lucy bought
34 as many post-it pads as correction tapes at first. After she bought another 29 post-it pads and 83 correction tapes, there were
25 as many post-it pads as correction tapes. How many post-it pads and correction tapes did Lucy 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 |
+ 145 |
+ 29 |
+ 83 |
+ 166 |
| After |
10 p |
2 p |
5 p |
10 p |
Make p the same.
(3) = (4)
15 u + 145 = 8 u + 166
15 u - 8 u = 166 - 145
7 u = 21
1 u = 21 ÷ 7 = 3
Number of post-it pads and correction tapes that Lucy bought at first
= 3 u + 4 u
= 7 u
= 7 x 3
= 21
Answer(s): 21
