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

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

Step 1: −2(m) = −2(6 + n)
2m = 8 + 8n

Step 2: −2m = −12 − 2n
2m = 8 + 8n

Step 3: −12 − 2n = 8 + 8n

Step 4: −20 = 10n

Step 5: n = −2

Question

The work of a student to solve a set of equations is shown below:

Equation 1: m = 6 + n
Equation 2: 2m = 8 + 8n


Step 1: 	−2(m) = 	−2(6 + n)
 	2m = 	8 + 8n
 
Step 2: 	−2m = 	−12 − 2n
 	2m = 	8 + 8n
 
Step 3: 	−12 − 2n = 	8 + 8n
 
Step 4: 	−20 = 	10n
 
Step 5: 	n = 	−2

anonymous · Answer

In which step did the student first make an error?

alexandervonhumboldt2 · Answer

3 he makked an error with sing

anonymous · Answer

ty

solomonzelman · Answer

Please refer to the code of conduct, I have told you so many times not to give out answers.
$\bf\color{blu}{\href{http:///openstudy.com/code-of-conduct}{Code~of~Conduct}}$

anonymous · Answer

.

anonymous · Answer

Which of the following ordered pairs represents the solution to the system given below? 

x − 4y = 7
5x + 9y = 6

anonymous · Answer

x - 4y = 7

5x + 9y = 6

solomonzelman · Answer

you can solve the system, it's not hard:
$\large\color{blue}{  x - 4y = 7  }$
$\large\color{blue}{  5x + 9y = 6  }$

multiplying the first equation times -5,

$\large\color{blue}{  -5x +20y = -35  }$
$\large\color{blue}{  5x ~~+ 9y = 6  }$

solomonzelman · Answer

add the equations, (the X's will cancel) and tell me what you get for y.