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1.Solve the equation. Check for extraneous solutions.

|2z - 3| = 4z -1

2. Solve each inequality. Graph the solutions.
|3x -4| + 5 < (or equal to) 27

User Mabel Oza
by
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1 Answer

5 votes
Okay so I did the math.

1. Two solutions were found :
z=-1
z=2/3
Step 1 :Rearrange this Absolute Value EquationAbsolute value equalitiy entered
|2z-3| = 4z-1
Step 2 :Clear the Absolute Value BarsClear the absolute-value bars by splitting the equation into its two cases, one for the Positive case and the other for the Negative case.

The Absolute Value term is |2z-3|

For the Negative case we'll use -(2z-3)

For the Positive case we'll use (2z-3)

Step 3 :Solve the Negative Case -(2z-3) = 4z-1

Multiply
-2z+3 = 4z-1

Rearrange and Add up
-6z = -4

Divide both sides by 6
-z = -(2/3)

Multiply both sides by (-1)
z = (2/3)
Which is the solution for the Negative CaseStep 4 :Solve the Positive Case (2z-3) = 4z-1

Rearrange and Add up
-2z = 2

Divide both sides by 2
-z = 1

Multiply both sides by (-1)
z = -1
Which is the solution for the Positive Case
Step 5 :Wrap up the solution z=2/3
z=-1

2.
-6 < x < 26/3

Step 1 :Rearrange this Absolute Value InequalityAbsolute value inequalitiy entered
|3x-4|+5 < 27

Another term is moved / added to the right hand side.

|3x-4| < 22 Step 2 :Clear the Absolute Value BarsClear the absolute-value bars by splitting the equation into its two cases, one for the Positive case and the other for the Negative case.

The Absolute Value term is |3x-4|

For the Negative case we'll use -(3x-4)

For the Positive case we'll use (3x-4)

Step 3 :Solve the Negative Case -(3x-4) < 22

Multiply
-3x+4 < 22

Rearrange and Add up
-3x < 18

Divide both sides by 3
-x < 6

Multiply both sides by (-1)
Remember to flip the inequality sign
x > -6
Which is the solution for the Negative CaseStep 4 :Solve the Positive Case (3x-4) < 22

Rearrange and Add up
3x < 26

Divide both sides by 3
x < (26/3)

Which is the solution for the Positive CaseStep 5 :Wrap up the solution -6 < x < 26/3Solution in Interval Notation (-6,26/3) HOPE THIS HELPS :D
User Tterrace
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