Math

QuestionSolve for xx in the equation x9=4|x-9|=4. Separate your answers with a comma.

Studdy Solution

STEP 1

Assumptions1. We are solving the absolute value equation |x-9|=4. . The absolute value of a number is its distance from zero on the number line, and is always positive or zero.
3. The equation |x-9|=4 means that the distance between x and9 on the number line is4 units.

STEP 2

The absolute value equation |x-9|=4 can be rewritten as two separate equations, because the distance between x and9 can be4 units to the right or4 units to the left.
x9=4andx9=4x-9=4 \quad \text{and} \quad x-9=-4

STEP 3

Now, we solve the first equation for x.
x9=x-9=

STEP 4

Add9 to both sides of the equation to isolate x.
x=4+9x=4+9

STEP 5

Calculate the value of x.
x=4+9=13x=4+9=13

STEP 6

Next, we solve the second equation for x.
x9=4x-9=-4

STEP 7

Add9 to both sides of the equation to isolate x.
x=4+9x=-4+9

STEP 8

Calculate the value of x.
x=4+=5x=-4+=5The solutions to the equation |x-|=4 are x=13 and x=5.

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