A + 1 square = 10 squares
A + B = 10 squares
B + C = A + 4 squares
- A = _____ squares
- B = _____ squares
- C = _____ squares
A + 1 square = 10 squares --- (1)
A + B = 10 squares --- (2)
B + C = A + 4 squares --- (3)
(a)
From (1)
A + 1 square = 10 squares
A = 10 squares - 1 square
A = 9 squares
(b)
Substitute A = 9 squares into (2).
A + B = 10 squares
9 squares + B = 10 squares
B = 10 squares - 9 squares
B = 1 squares
(c)
Substitute A = 9 squares and B = 1 squares into (3).
B + C = A + 4 squares
1 squares + C = 9 squares + 4 squares
1 squares + C = 13 squares
C = 13 squares - 1 squares
C = 12 squares
Answer(s): (a) 9; (b) 1; (c) 12