The work of a student to solve a set of equations is shown: Equation A: y = 15 - 22
Equation B: 3y = 3 - 42
Step 1: -3(y) = -3/15 - 22) (Equation A is multiplied by -3.)
Зу = 3- 42
[Equation B]
Step 2: -3y = 15 - 22 [Equation A in Step 1 is simplified.)
3y = 3-4 [Equation B]
Step 3: 0 = 18 - 62 [Equations in Step 2 are added.)
Step 4: 62 = 18
Step 5: Z = 3
In which step did the student first make an error?
Step 4
Step 3
Step 2
Step 1