Question

3*(x-2)+9=30   giúp mình với mình đang cần gấp

 

Answer 1

\(3\times\left(x-2\right)+9=30\)

\(3\times\left(x-2\right)=30-9\)

\(3\times\left(x-2\right)=21\)

\(x-2=7\)

\(x=9\)

Answer 2

\(3.\left(x-2\right)+9=30\)

\(\Leftrightarrow3x-6+9=30\)

\(\Leftrightarrow3x=27\)

\(\Leftrightarrow x=9\)

Answer 3

3 x ( x - 2 ) + 9 = 30

3 x ( x - 2 ) = 30 - 9

3 x ( x - 2 ) = 21

x - 2 = 7

x = 9

Answer 4

3 x ( x - 2 ) + 9 = 30

3 x ( x - 2 ) = 30 - 9

3 x ( x - 2 ) = 21

x - 2 = 7

x = 9