Which is the first incorrect step?

Step 1

Step 2

Step 3

Solution is correct

Step 2

Step 3

Solution is correct

Which is the first incorrect step?

Step 1

Step 2

Step 3

Solution is correct

Step 2

Step 3

Solution is correct

Tutors, please sign in to answer this question.

Sandy Spring, MD

First: Note that |2x - 4| - 3 = 3

What needs to be done to isolate the variable?

Add 3

That gives: |2x - 4| = 6.

There are two answers at this point: +6 and -6.

Therefore: 2x - 4 = 6, 2x = 10, x = 5.

and: 2x - 4 = -6, 2x = -2, x = -1.

But wait ..... were are not done: Check: |2(5)-4| -3 = |10-4| -3 = 6-3 =3, |2(-1)-4| = |-2-4|-3 = 6-3 = 3.

I hope this explains the problem. Remember, each absolute value problem has two answers, at most .

Dana R.

English/Math SAT PrepTutor with PhD

Lynbrook, NY

4.8
(85 ratings)

Michael F.

HARVARD/MIT TUTOR: ECON, FINANCE, ACCOUNTING, STATISTICS

New York, NY

4.9
(462 ratings)

Gilant P.

Miss Gil: Cares & Gets Results - Regents, SAT & NYS ELA & Math Exams

Jamaica, NY

4.8
(1455 ratings)

- Math Help 4600
- Math 7993
- Math Problem 873
- Math Word Problem 3479
- Math Equations 904
- Math Answers 366
- Math Help For College 1264
- Mathematics 458
- Maths 569
- Precalculus 1347