A + B = 5
A - B = 3
- Which letter has a bigger value?
- What is the total value?
- Find B.
- Find A.
(a)
A - B = 3
So, A is has a bigger value than B.
(b)
A + B = 5
So, the total value is 5.
(c)
B = 1 u
A = 1 u + 3
Total
= 1 u + 1 u + 3
= 2 u + 3
2 u + 3 = 5
2 u = 5 - 3 = 2
1 u = 2 ÷ 2 = 1
B = 1
(d)
A
= 1 u + 3
= 1 + 3
= 4
Answer(s): (a) A; (b) 5, (c) 1; (d) 4