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