A + 2 triangle = 7 triangles
A + B = 7 triangles
B + C = A + 1 triangles
- A = _____ triangles
- B = _____ triangles
- C = _____ triangles
A + 2 triangle = 7 triangles --- (1)
A + B = 7 triangles --- (2)
B + C = A + 1 triangles --- (3)
(a)
From (1)
A + 2 triangle = 7 triangles
A = 7 triangles - 2 triangle
A = 5 triangles
(b)
Substitute A = 5 triangles into (2).
A + B = 7 triangles
5 triangles + B = 7 triangles
B = 7 triangles - 5 triangles
B = 2 triangles
(c)
Substitute A = 5 triangles and B = 2 triangles into (3).
B + C = A + 1 triangles
2 triangles + C = 5 triangles + 1 triangles
2 triangles + C = 6 triangles
C = 6 triangles - 2 triangles
C = 4 triangles
Answer(s): (a) 5; (b) 2; (c) 4