A + 4 star = 6 stars
A + B = 9 stars
B + C = A + 6 stars
- A = _____ stars
- B = _____ stars
- C = _____ stars
A + 4 star = 6 stars --- (1)
A + B = 9 stars --- (2)
B + C = A + 6 stars --- (3)
(a)
From (1)
A + 4 star = 6 stars
A = 6 stars - 4 star
A = 2 stars
(b)
Substitute A = 2 stars into (2).
A + B = 9 stars
2 stars + B = 9 stars
B = 9 stars - 2 stars
B = 7 stars
(c)
Substitute A = 2 stars and B = 7 stars into (3).
B + C = A + 6 stars
7 stars + C = 2 stars + 6 stars
7 stars + C = 8 stars
C = 8 stars - 7 stars
C = 1 stars
Answer(s): (a) 2; (b) 7; (c) 1