Question 19 (4 points)
Chuy tried to determine the solution for the system of equations using substitution. His work is shown below.
x - y = 7
3x - 2y = 8
Step 1. x = y + 7
Step 2. 3(y + 7) - 2y = 8
Step 3. 3y + 7 - 2y = 8
Step 4y + 7 = 8
Step 5: y = 1
In which step did Chuy make the first error?
Step 1
Step 2
Step 3
Step 4
C
d