What is the answer to 3|2x-1|=21 ?

The answer to 3|2x-1|=21 is x=-3\lor x=4

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

3|2x-1|=21

3 ∣ 2 x - 1 ∣ = 21

x = - 3 or x = 4

Solution steps

3 ∣ 2 x - 1 ∣ = 21

Divide both sides by

3

∣ 2 x - 1 ∣ = 7

Apply absolute rule: If

∣ u ∣ = a, a > 0

then

u = a

u = - a

2 x - 1 = - 7 or 2 x - 1 = 7

2 x - 1 = - 7 or 2 x - 1 = 7

x = - 3 or x = 4

\frac{( 2 + 3 i ) ( 1 - i ) - ( 3 + 4 i ) ^{2}}{2 i ^{14} - i ^{- 7}}

25 > - 2 m

4 (u + 9) > 4 u + 2

∣ x - 6 ∣ < 5