Aunt Sabrina made 100 more wafers than cookies. After she gave 0.9 of the wafers and
25 of the cookies to Gem, she was left with 155 more wafers than cookies. How many wafers did she make?
| |
Wafers |
Cookies |
Comparing wafers
and cookies at first |
|
100 more |
Before |
10 u |
5x2 + 100 =
10 u + 100 |
Change |
- 9 u |
- 2x2 - 40 =
- 4 u - 40
|
After |
1 u |
3x2 + 60 =
6 u + 60 |
Comparing wafers
and cookies in the end |
|
155 more |
0.9 =
910 25 x 100 = 40
Number of cookies that Aunt Sabrina gave to Gem = 4 u + 40
If Aunt Sabrina made another 155 wafers in the end, the number of wafers and cookies in the end would be the same.
6 u + 60 = 1 u + 155
6 u - 1 u = 155 - 60
5 u = 95
1 u = 95 ÷ 5 = 19
Number of wafers that Aunt Sabrina made
= 10 u
= 10 x 19
= 190
Answer(s): 190
