-|x|=|x|

Solution

- ∣ x ∣ = ∣ x ∣

x = 0

Solution steps

- ∣ x ∣ = ∣ x ∣

Move

∣ x ∣

to the left side

- 2 ∣ x ∣ = 0

Divide both sides by

- 2

∣ x ∣ = 0

Apply absolute rule: If

∣ u ∣ = 0

then

u = 0

x = 0

9 ∣ 9 - 2 p ∣ = 81

∣ x ∣ - 1 = 0

∣ a + 6 ∣ = 6

\frac{∣ x + 2 ∣}{6} = 1

2 - ∣ k - 1 ∣ = - 6