OpenStudy (anonymous):

The work of a student to solve a set of equations is shown below: Equation 1: m = 8 + 2n Equation 2: 4m = 4 + 4n Step 1: −4(m) = −4(8 + 2n) 4m = 4 + 4n Step 2: −4m = −32 − 8n 4m = 4 + 4n Step 3: −4m + 4m = −32 − 8n + 4n Step 4: 0 = −32 − 4n Step 5: n = − 8 In which step did the student first make an error?

2 years ago
OpenStudy (anonymous):

He is solving this my using elimination

2 years ago
OpenStudy (anonymous):

On step 2 is where he made his mistake because you see that he has to add up the two equations to cancel each other out but he forgot to add 4 to the -32.

2 years ago
OpenStudy (anonymous):

Well, on step 3 because that's where it actually shows his mistake.

2 years ago
OpenStudy (anonymous):

you were right is the third one

2 years ago
OpenStudy (anonymous):