A + B = 4
A - B = 2
- Which letter has a bigger value?
- What is the total value?
- Find B.
- Find A.
(a)
A - B = 2
So, A is has a bigger value than B.
(b)
A + B = 4
So, the total value is 4.
(c)
B = 1 u
A = 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
B = 1
(d)
A
= 1 u + 2
= 1 + 2
= 3
Answer(s): (a) A; (b) 4, (c) 1; (d) 3