Mathematics
bpell
28

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made. (5 points) −5x − 25 = 78 Step 1: −5x − 25 − 25 = 78 − 25 Step 2: −5x = 53 Step 3: = Step 4: x = Step 1: She should have added 25 to each side. Step 1: She should have divided both sides by −5. Step 3: She should have divided both sides by −5. Step 3: She should have multiplied both sides by −5

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(2) Answers
KatriceLaigo

she should have added 25 instead of subtracted 25...step 1 error

Cruea881

If you would like to solve the equation -5x - 25 = 78, you should do this using the following steps: -5x - 25 = 78 -5x - 25 + 25 = 78 + 25 -5x + 0 = 103 -5x = 103 /(-5) x = 103 / (-5) x = - 103/5 = - 20.6 The error was already made at step 1.

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