Discover a wealth of information and get your questions answered on IDNLearn.com. Ask your questions and receive comprehensive, trustworthy responses from our dedicated team of experts.
Answer:
a = 11
Step-by-step explanation:
XY + YZ = XZ = 19
(a + 4) + (a - 7) = 19
2a - 3 = 19
2a = 22
a = 11