16. Complete the proof.
If X-Y-Z and XZ = 24, then a = 8.
Statements
1. X-Y-Z; XZ = 24;
XY = 3a7; YZ = 15 - a
2. XY+YZ = XZ
3.
4. 2a + 8 = 24
5. 2a = 16
6. a 8
1. given
3a-7
Reasons
2.
3. substitution
4.
5.
6.
15-a