What is the value of y in the solution of the system of equations? 2x + y + z = 1
2x – y – 3z = –3

x – 2y – 4z = –2

a 5

b -10

c -8

Given: jk ||lm prove: _2 = 27 statement justification 1. jk ||lm 1. given 2.26 = 27 3.22 = 26 2. 3. 4. _2 = 27 4. corresponding angles theorem transitive property of equality vertical angles theorem substitution property of equality