Question

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. −5x − 25 = 78

Step 1: −5x − 25 − 25 = 78 − 25
Step 2: −5x = 53
Step 3: negative five times x over negative five = fifty-three over negative five Step 4: x = negative fifty-three over five
(A.) Step 1: She should have added 25 to each side.
(B.)Step 1: She should have divided both sides by −5.
(C.)Step 3: She should have divided both sides by −5.
(D.)Step 3: She should have multiplied both sides by −5.

Answer 1

A

Explanation:

she should have added 25 to both

Answer 2

A

Explanation:

She should have added 25 to each side in order to cancel it out.