What is the answer to |x|+3=12 ?

The answer to |x|+3=12 is x=-9\lor x=9

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|x|+3=12

∣ x ∣ + 3 = 12

x = - 9 or x = 9

Solution steps

∣ x ∣ + 3 = 12

Move

3

to the right side

∣ x ∣ = 9

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

x = - 9 or x = 9

- 2 (u + 6) + 6 u = 4 (u - 3)

19 g + 2 - 15 g - 8

- 7 x + 8 = 57

8 x^{2} y - 20 x^{2} - 12 y + 30

x^{2} - 2 ∣ x ∣ - 3 = 0