Rnesto 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 4: y + 7 = 8 Step 5: y = 1 In which step did Ernesto make the first error

Question

9 July, 09:48

+1

Answers (1)

Know the Answer?

Deven Perry · Answer 1

Step 3 because he did not distribute the multiplication over the addition correctly

Step 3 should be

3y+21-2y=8