A + 3 star = 7 stars
A + B = 5 stars
B + C = A + 4 stars
- A = _____ stars
- B = _____ stars
- C = _____ stars
A + 3 star = 7 stars --- (1)
A + B = 5 stars --- (2)
B + C = A + 4 stars --- (3)
(a)
From (1)
A + 3 star = 7 stars
A = 7 stars - 3 star
A = 4 stars
(b)
Substitute A = 4 stars into (2).
A + B = 5 stars
4 stars + B = 5 stars
B = 5 stars - 4 stars
B = 1 stars
(c)
Substitute A = 4 stars and B = 1 stars into (3).
B + C = A + 4 stars
1 stars + C = 4 stars + 4 stars
1 stars + C = 8 stars
C = 8 stars - 1 stars
C = 7 stars
Answer(s): (a) 4; (b) 1; (c) 7