What is the answer to -2|-2r-4|=-12 ?

The answer to -2|-2r-4|=-12 is r=-5\lor r=1

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-2|-2r-4|=-12

- 2 ∣ - 2 r - 4 ∣ = - 12

r = - 5 or r = 1

Solution steps

- 2 ∣ - 2 r - 4 ∣ = - 12

Divide both sides by

- 2

∣ - 2 r - 4 ∣ = 6

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

- 2 r - 4 = - 6 or - 2 r - 4 = 6

- 2 r - 4 = - 6 or - 2 r - 4 = 6

r = - 5 or r = 1

∣ a + 13 ∣ = 27

6 \geq \frac{1}{2} x + 21

∣ 2 x + 4 ∣ = 6

\frac{550000}{( 1 + 0.04 ) ^{5}}

x + 1 = 4 x + 1

What is the answer to -2|-2r-4|=-12 ?
The answer to -2|-2r-4|=-12 is r=-5\lor r=1
Solve for r: -2|-2r-4|=-12
The solution is r=-5\lor r=1