What is the answer to |v|+13=21 ?

The answer to |v|+13=21 is v=-8\lor v=8

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|v|+13=21

∣ v ∣ + 13 = 21

v = - 8 or v = 8

Solution steps

∣ v ∣ + 13 = 21

Move

13

to the right side

∣ v ∣ = 8

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

v = - 8 or v = 8

∣ 4 - 5 x ∣ = 4

- 10 + 5 ∣ 9 - 4 x ∣ = 115

∣ 0.2 x + 5 ∣ = x^{2} - 2

3 ∣ 3 (x + 5) (x - 1) ∣ + 5 = 32

- 5 ∣ 6 - h ∣ + 7 = - 13