Enter an equation or problem
Camera input is not recognized!

Solution - Absolute value equations

Exact form: x=8,6
x=8 , -6

Other Ways to Solve

Absolute value equations

Step-by-step explanation

1. Rewrite the equation with one absolute value terms on each side

|4x60|+|8x36|=0

Add |8x36| to both sides of the equation:

|4x60|+|8x36||8x36|=|8x36|

Simplify the arithmetic

|4x60|=|8x36|

2. Rewrite the equation without absolute value bars

Use the rules:
|x|=|y|x=±y and |x|=|y|±x=y
to write all four options of the equation
|4x60|=|8x36|
without the absolute value bars:

|x|=|y||4x60|=|8x36|
x=+y(4x60)=(8x36)
x=y(4x60)=(8x36)
+x=y(4x60)=(8x36)
x=y(4x60)=(8x36)

When simplified, equations x=+y and +x=y are the same and equations x=y and x=y are the same, so we end up with only 2 equations:

|x|=|y||4x60|=|8x36|
x=+y , +x=y(4x60)=(8x36)
x=y , x=y(4x60)=(8x36)

3. Solve the two equations for x

12 additional steps

(4x-60)=-(8x-36)

Expand the parentheses:

(4x-60)=-8x+36

Add to both sides:

(4x-60)+8x=(-8x+36)+8x

Group like terms:

(4x+8x)-60=(-8x+36)+8x

Simplify the arithmetic:

12x-60=(-8x+36)+8x

Group like terms:

12x-60=(-8x+8x)+36

Simplify the arithmetic:

12x60=36

Add to both sides:

(12x-60)+60=36+60

Simplify the arithmetic:

12x=36+60

Simplify the arithmetic:

12x=96

Divide both sides by :

(12x)12=9612

Simplify the fraction:

x=9612

Find the greatest common factor of the numerator and denominator:

x=(8·12)(1·12)

Factor out and cancel the greatest common factor:

x=8

14 additional steps

(4x-60)=-(-(8x-36))

NT_MSLUS_MAINSTEP_RESOLVE_DOUBLE_MINUS:

(4x-60)=8x-36

Subtract from both sides:

(4x-60)-8x=(8x-36)-8x

Group like terms:

(4x-8x)-60=(8x-36)-8x

Simplify the arithmetic:

-4x-60=(8x-36)-8x

Group like terms:

-4x-60=(8x-8x)-36

Simplify the arithmetic:

4x60=36

Add to both sides:

(-4x-60)+60=-36+60

Simplify the arithmetic:

4x=36+60

Simplify the arithmetic:

4x=24

Divide both sides by :

(-4x)-4=24-4

Cancel out the negatives:

4x4=24-4

Simplify the fraction:

x=24-4

Move the negative sign from the denominator to the numerator:

x=-244

Find the greatest common factor of the numerator and denominator:

x=(-6·4)(1·4)

Factor out and cancel the greatest common factor:

x=6

4. List the solutions

x=8,6
(2 solution(s))

5. Graph

Each line represents the function of one side of the equation:
y=|4x60|
y=|8x36|
The equation is true where the two lines cross.

Why learn this

We encounter absolute values almost daily. For example: If you walk 3 miles to school, do you also walk minus 3 miles when you go back home? The answer is no because distances use absolute value. The absolute value of the distance between home and school is 3 miles, there or back.
In short, absolute values help us deal with concepts like distance, ranges of possible values, and deviation from a set value.