What is the answer to -4|8+4r|+7=-57 ?

The answer to -4|8+4r|+7=-57 is r=-6\lor r=2

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-4|8+4r|+7=-57

- 4 ∣ 8 + 4 r ∣ + 7 = - 57

r = - 6 or r = 2

Solution steps

- 4 ∣ 8 + 4 r ∣ + 7 = - 57

Move

7

to the right side

- 4 ∣ 8 + 4 r ∣ = - 64

Divide both sides by

- 4

∣ 8 + 4 r ∣ = 16

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

8 + 4 r = - 16 or 8 + 4 r = 16

8 + 4 r = - 16 or 8 + 4 r = 16

r = - 6 or r = 2

4.6 ∣ 0.5 - x ∣ + 1 = 3.3

1 = ∣ s ∣ + 1

∣ u + 620 ∣ = 25

∣ - 4 - 7 n ∣ = 45

- 5 ∣ 4 + 5 x ∣ + 3 = 13

What is the answer to -4|8+4r|+7=-57 ?
The answer to -4|8+4r|+7=-57 is r=-6\lor r=2
Solve for r: -4|8+4r|+7=-57
The solution is r=-6\lor r=2