What is the answer to -7|-3-3r|=-21 ?

The answer to -7|-3-3r|=-21 is r=-2\lor r=0

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-7|-3-3r|=-21

- 7 ∣ - 3 - 3 r ∣ = - 21

r = - 2 or r = 0

Solution steps

- 7 ∣ - 3 - 3 r ∣ = - 21

Divide both sides by

- 7

∣ - 3 - 3 r ∣ = 3

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

- 3 - 3 r = - 3 or - 3 - 3 r = 3

- 3 - 3 r = - 3 or - 3 - 3 r = 3

r = - 2 or r = 0

x^{2} - 5 = 1

∣ x + 5 ∣ - 1 = - 1

9 ∣ - 2 v + 1 ∣ + 1 = 46

x^{2} + 2 x - 5 = 3

- 2 ∣ 5 x - 7 ∣ + 9 = - 7

What is the answer to -7|-3-3r|=-21 ?
The answer to -7|-3-3r|=-21 is r=-2\lor r=0
Solve for r: -7|-3-3r|=-21
The solution is r=-2\lor r=0