What is the answer to -15=-3|k| ?

The answer to -15=-3|k| is k=-5\lor k=5

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-15=-3|k|

- 15 = - 3 ∣ k ∣

k = - 5 or k = 5

Solution steps

- 15 = - 3 ∣ k ∣

Switch sides

- 3 ∣ k ∣ = - 15

Divide both sides by

- 3

∣ k ∣ = 5

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

k = - 5 or k = 5

∣ 7 x + 12 ∣ = 2

∣ x \cdot 9 ∣ = - x + 13

4 = ∣ y + 2 ∣

\frac{x}{6} - 4 = - 3

∣ w + 1 ∣ = 6