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Popular >

|3x+9|<12

Solution

∣ 3 x + 9 ∣ < 12

Solution

- 7 < x < 1

+1

Interval Notation

(- 7, 1)

Solution steps

∣ 3 x + 9 ∣ < 12

Apply absolute rule: If

∣ u ∣ < a, a > 0

then

- a < u < a

- 12 < 3 x + 9 < 12

3 x + 9 > - 12 and 3 x + 9 < 12

x > - 7 and x < 1

Merge Overlapping Intervals

- 7 < x < 1

Popular Examples

factor (s^2+1)(s^3+1)factor

(s^{2} + 1) (s^{3} + 1)

simplify ln(1+0)simplify

ln (1 + 0)

factor x^2-x-42 factor

x^{2} - x - 42

factor-x^3+2x^2+21x+18 factor

- x^{3} + 2 x^{2} + 21 x + 18

- 15 \leq x + 8 < - 2

Frequently Asked Questions (FAQ)

What is |3x+9|<12 ?
The solution to |3x+9|<12 is -7<x<1