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15 votes
15 votes
Solve the following equation:
|2x - 3|= 4x - 1

User Grofte
by
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2 Answers

30 votes
30 votes

Answer: x=2/3

Explanation:

|2x - 3|= 4x - 1

2x-3=4x-1

2x=4x+2

-2x=2

x=-1

4(-1)-1=

-4-1=-5 ==> Absolutes values can't equal a negative number

-(2x-3)=4x-1

-2x+3=4x-1

3=6x-1

6x=4

x=4/6

x=2/3

User Tanzil
by
3.1k points
13 votes
13 votes

Hi there,

Happy to help! So let's get into it!


|2x - 3| = 4x - 1\\

The first step to take is to solve for the Absolute Value.

Thus, we know either
2x - 3 =4x-1 or
2x-3=-(4x-1)

So now let's solve both possibilities:

Possibility #1


2x - 3 = 4x \\

Subtract
4x from both sides


2x - 3 -4x=4x-1-4x


-2x -3=-1\\-2x=-1+3\\-2x=2\\x = (2)/(-2) \\x = -1

Now let's solve the second possibility

Possibility #2


2x -3=-(4x-1)\\

So basically here we need to simplify it. And we can start doing that by adding
4x to both sides


2x - 3 + 4x = -4x +1+4x \\6x - 3 = 1\\6x = 1+3\\6x = 4 \\x = (4)/(6) \\x = (2)/(3)

The answer is
x = (2)/(3)

All the best this semester!

User Enyo
by
2.9k points