Jeremy has four times as many marbles as Andy. Andy has 11 more marbles than Gabriel. They have a total of 79 marbles.
- How many marbles does Jeremy have?
- How many marbles does Gabriel have?
(a)
Number of marbles that Andy has = 1 u
Number of marbles that Gabriel has = 1 u - 11
Number of marbles that Jeremy has = 4 u
Total number of marbles
= 1 u + 1 u - 11 + 4 u
= 6 u - 11
6 u - 11 = 79
6 u = 79 + 11
6 u = 90
1 u = 90 ÷ 6 = 15
Number of marbles that Jeremy has
= 4 u
= 4 x 15
= 60
(b)
Number of marbles that Gabriel has
= 1 u - 11
= 15 - 11
= 4
Answer(s): (a) 60; (b) 4
