A + B = 15
A - B = 5
- Which letter has a bigger value?
- What is the total value?
- Find B.
- Find A.
(a)
A - B = 5
So, A is has a bigger value than B.
(b)
A + B = 15
So, the total value is 15.
(c)
B = 1 u
A = 1 u + 5
Total
= 1 u + 1 u + 5
= 2 u + 5
2 u + 5 = 15
2 u = 15 - 5 = 10
1 u = 10 ÷ 2 = 5
B = 5
(d)
A
= 1 u + 5
= 5 + 5
= 10
Answer(s): (a) A; (b) 15, (c) 5; (d) 10