What is the answer to |13+4x|=15 ?

The answer to |13+4x|=15 is x=-7\lor x= 1/2

Solve for x: |13+4x|=15

The solution is x=-7\lor x= 1/2

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∣ 13 + 4 x ∣ = 15

x = - 7 or x = \frac{1}{2}

Solution steps

∣ 13 + 4 x ∣ = 15

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

13 + 4 x = - 15 or 13 + 4 x = 15

13 + 4 x = - 15 or 13 + 4 x = 15

x = - 7 or x = \frac{1}{2}

∣ z - 8 ∣ = 2

∣ - x + 9 ∣ = 3

0 = 4 ∣ c ∣

∣ x + 8 ∣ = - (x + 8)

- 4 + 2 ∣ 5 x + 1 ∣ = 16