Raeann had 30 more small pebbles than Shannon at first. After Raeann bought another 28 small pebbles, she had thrice as many small pebbles as Shannon. How many small pebbles did Raeann have at first?
| |
Raeann |
Shannon |
| Before |
1 u + 30 |
1 u |
| Change |
+ 28 |
|
| After |
1 u + 58 |
1 u |
Number of small pebbles Raeann had in the end
= 3 x 1 u
= 3 u
3 u = 1 u + 58
3 u - 1 u = 58
2 u = 58
1 u = 58 ÷ 2 = 29
Number of small pebbles Raeann had at first
= 1 u + 30
= 29 + 30
= 59
Answer(s): 59
