Question

The work of a student to solve a set of equations is shown:

Equation 1: m = 8 + 2n
Equation 2: 6m = 4 + 4n


Step 1: −6(m) = −6(8 + 2n) [Equation 1 is multiplied by −6.]
6m = 4 + 4n [Equation 2]
Step 2: −6m = −48 − 12n [Equation 1 in Step 1 is simplified.]
6m = 4 + 4n [Equation 2]
Step 3: −6m + 6m = −48 − 12n + 4n [Equations in Step 2 are added.]
Step 4: 0 = −48 − 8n
Step 5: n = −6


In which step did the student first make an error?
Step 3
Step 5
Step 4
Step 2

I chose D? Am I correct ?

Answer 1

Yes I believe so

Answer 2

Okay thank you

Answer 3

No problem any more questions just tag me

Answer 4

ok

Answer 5

NO it was step 3

Answer 6

oh ok

Answer 7

add again

Answer 8

by now you should notice that not everyone has the correct answer so you need to understand what is expected to solve the problem

Answer 9

okay

Answer 10

let me check this...it looks confusing to me

multiply eq 1 by -6
-6m = -48 - 12n
add the 2 equations
-6m = -48 - 12n
6m = 4 + 4n
--------------add
0 = - 44 - 8n <====step 4 is wrong