Mathematics

Keith Decker

28 November, 00:46

Pengebra V16 oshua Wamare 4028 Si

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: - 3y) = - 3 (15 - 22) (Equation A is multiplied by-3.]

3y = 3-4 Equation B]

Step 2: - 3y = 15-22 (Equation A in Step 1 is simplified)

3y = 3 - 42 [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