A + B = 7
A - B = 1
- Which letter has a bigger value?
- What is the total value?
- Find B.
- Find A.
(a)
A - B = 1
So, A is has a bigger value than B.
(b)
A + B = 7
So, the total value is 7.
(c)
B = 1 u
A = 1 u + 1
Total
= 1 u + 1 u + 1
= 2 u + 1
2 u + 1 = 7
2 u = 7 - 1 = 6
1 u = 6 ÷ 2 = 3
B = 3
(d)
A
= 1 u + 1
= 3 + 1
= 4
Answer(s): (a) A; (b) 7, (c) 3; (d) 4