Question

Explain the students mistake

Answer 1

The student was supposed to multiply 4(1+5n) to equal 4+20n instead she forgot to multiply 5n and put 4+5n.

Explanation:

-8n + 4(1 + 5n) = -6n -14

-8n + 4 + 20n = -6n -14

12n+4 = -6n -14

+6n +6n

18n +4 = -14

-4 -4

18n= -18

n = - 1

Answer 2

-8n+4+20n=-6n-14
12n+6n+4=-14-4
18n=-18
n=-1