Archie had 209 erasers more than Eva. Given that they have a total of 421 erasers,
- how many erasers did Eva have?
- how many erasers did Archie have?
(a)
Number of erasers that Archie that = 1 u + 209
Number of erasers that Eva had = 1 u
Total number of erasers
= 1 u + 209 + 1 u
= 2 u + 209
2 u + 209 = 421
2 u = 421 - 209
2 u = 212
1 u = 212 ÷ 2 = 106
Number of erasers that Eva had
= 1 u
= 106
(b)
Number of erasers that Archie had
= 1 u + 209
= 106 + 209
= 315
Answer(s): (a) 106; (b) 315
