Question

tim x: (9x - 21) ÷ 3= 2

Answer 1

(9x - 21) : 3 = 2

(9x - 21) = 2 x 3

9x - 21 = 6

9x = 6 + 21

9x = 27

x = 27 : 9

x = 3

Answer 2

Tìm x : 

 ( 9x - 21 ) : 3 = 2 

9x - 21 = 2 × 3 

9x - 21 = 6 

9x = 6 + 21 

9x = 27 

x = 27 : 9 

x = 3 

Vây x = 3

Answer 3

\(\left(9x-21\right):3=2\)

\(9x-21=6\)

\(9x=6+21\)

\(9x=27\)

\(x=3\)