Proof: Divide Substitute 2
Let's prove the following theorem:
if the following are true:
- a = x
- b = y
then a / b = x / y
Proof:
Given
| 1 | a = x |
|---|---|
| 2 | b = y |
| # | Claim | Reason |
|---|---|---|
| 1 | a / b = x / b | if a = x, then a / b = x / b |
| 2 | a / b = x / y | if a / b = x / b and b = y, then a / b = x / y |
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