Question

Choice #1: Marie made an error when solving the equation below.
Part A: Identify Marie’s error and explain why it resulted in an incorrect solution.

Part B: Correctly solve 4x - 8 = 36 for x. Show your work.

Answer 1

Answer:

Marie's error is not adding the 8 on both sides, she needs to add 8 to the 36.

Step-by-step explanation:

This resulted in an incorrect solution because by adding the 8 to the 36 you would get 44 so

4x-8=36

     +8=+8

4x=44

44/4 = 11 so x is 11

Answer 2

Answer:

Marie´s error was not to consider the number 8:

4x - 8 = 36

it´s equal to:

(4x-8)/4 = 36/4

4x/4 - 8/4 = 36/4

x - 2 = 9

x = 9+2

x = 11

probe:

4*11 - 8 = 36

44 - 8 = 36