B + A = 4
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 = 4
So, the total value is 4.
(c)
A = 1 u
B = 1 u + 2
Total
= 1 u + 1 u + 2
= 2 u + 2
2 u + 2 = 4
2 u = 4 - 2 = 2
1 u = 2 ÷ 2 = 1
A = 1
(d)
B
= 1 u + 2
= 1 + 2
= 3
Answer(s): (a) B; (b) 4, (c) 1; (d) 3