Question

Given: x/4-7=y and y=2
Prove: x=36
Using two column proof.

Answer 1

Statement | Reason
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1. y = 2 | Given
2. x/4 - 7 = y | Given
3. x/4 - 7 = 2 | Substitution (from statement 1)
4. x/4 = 2 + 7 | Addition Property of Equality
5. x/4 = 9 | Simplification
6. x = 9 * 4 | Multiplication Property of Equality
7. x = 36 | Simplification (multiplication)