A + 1 star = 7 stars
A + B = 8 stars
B + C = A + 9 stars
- A = _____ stars
- B = _____ stars
- C = _____ stars
A + 1 star = 7 stars --- (1)
A + B = 8 stars --- (2)
B + C = A + 9 stars --- (3)
(a)
From (1)
A + 1 star = 7 stars
A = 7 stars - 1 star
A = 6 stars
(b)
Substitute A = 6 stars into (2).
A + B = 8 stars
6 stars + B = 8 stars
B = 8 stars - 6 stars
B = 2 stars
(c)
Substitute A = 6 stars and B = 2 stars into (3).
B + C = A + 9 stars
2 stars + C = 6 stars + 9 stars
2 stars + C = 15 stars
C = 15 stars - 2 stars
C = 13 stars
Answer(s): (a) 6; (b) 2; (c) 13