Zane had some pens at first. After he bought another 70 pens, he had six times as many pens as before. How many pens did Zane have at first?
| |
Pens |
| Before |
1 u |
| Change |
+ 70 |
| After |
1 u + 70 = 6 u |
Number of pens after he bought = 1 u + 70
Number of pens that is six times as many pens as before = 6 x 1 u = 6 u
6 u = 1 u + 70
6 u - 1 u = 70
5 u = 70
1 u = 70 ÷ 5 = 14
Number of stickers that Kim had at first
= 1 u
= 14
Answer(s): 14
