B + A = 8
B - A = 2
- Which letter has a bigger value?
- What is the total value?
- Find A.
- Find B.
(a)
B - A = 2
So, B is has a bigger value than A.
(b)
B + A = 8
So, the total value is 8.
(c)
A = 1 u
B = 1 u + 2
Total
= 1 u + 1 u + 2
= 2 u + 2
2 u + 2 = 8
2 u = 8 - 2 = 6
1 u = 6 ÷ 2 = 3
A = 3
(d)
B
= 1 u + 2
= 3 + 2
= 5
Answer(s): (a) B; (b) 8, (c) 3; (d) 5