What is the answer to |8x+5|=21 ?

The answer to |8x+5|=21 is x=-13/4 \lor x=2

Solve for x: |8x+5|=21

The solution is x=-13/4 \lor x=2

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∣ 8 x + 5 ∣ = 21

x = - \frac{13}{4} or x = 2

Decimal Notation

x = - 3.25, x = 2

Solution steps

∣ 8 x + 5 ∣ = 21

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

8 x + 5 = - 21 or 8 x + 5 = 21

8 x + 5 = - 21 or 8 x + 5 = 21

x = - \frac{13}{4} or x = 2

- 3 ∣ x - 9 ∣ = - 27

7 ∣ x + 2 ∣ = - 70

∣ 4 + 8 c ∣ - 15 = - 7

3 ∣ x - 4 ∣ = 33

- ∣ 3 x - 2 ∣ + 4 = 14