Question

Tìm x biết (1−2x)3=27

Answer 1

\(\left(1-2x\right)3=27\)

\(3-6x=27\)

\(6x=3-27\)

\(6x=-24\)

\(x=-24:6\)

\(x=-4\)

Answer 2

( 1 - 2x ) x 3 = 27

( 1 - 2x ) = 27 : 3

( 1 - 2x ) = 9

<=> 1 - 2x = 9

<=> 2x = ( 9 + 1 )

<=> 2x = 10

<=> x = 10 : 2 = 5

=> x = 5

Answer 3

\(\left(1-2x\right)3=27\)

<=>\(1-2x=\frac{27}{3}\)

<=> \(1-2x=9\)

<=>\(-2x=9-1\)

<=>\(-2x=-8\)

<=>\(x=\frac{-8}{-2}\)

<=>\(x=4\)

Vậy \(x=4\)

Answer 4

(1-2x)=27:3

1-2x=9

2x=1-9

2x= -8

x=-4