Nora bought
34 as many foolscaps as correction tapes at first. After she bought another 18 foolscaps and 40 correction tapes, there were
35 as many foolscaps as correction tapes. How many foolscaps and correction tapes did Nora buy at first?
| |
Make p the same
(1)x5 = (3) |
Foolscaps
(1) |
Correction Tapes
(2) |
Make p the same
(2)x3 = (4) |
| Before |
15 u |
3 u |
4 u |
12 u |
| Change |
+ 90 |
+ 18 |
+ 40 |
+ 120 |
| After |
15 p |
3 p |
5 p |
15 p |
Make p the same.
(3) = (4)
15 u + 90 = 12 u + 120
15 u - 12 u = 120 - 90
3 u = 30
1 u = 30 ÷ 3 = 10
Number of foolscaps and correction tapes that Nora bought at first
= 3 u + 4 u
= 7 u
= 7 x 10
= 70
Answer(s): 70
