Question

3x - 2 = 19

 

Answer 1

\(3x-2=19\)

\(3x=19+2\)

\(3x=21\)

\(x=21:3\)

\(x=7\)

Answer 2

\(3x=19+2\\ 3x=21\\ x=21:3\\ x=7\)

Answer 3

3x - 2 = 19

3x = 21

x = 7

Answer 4

\(3x=19+2\)

\(3x=21\)

\(3x=\dfrac{21}{3}\)

\(3x=7\)

Answer 5

=>3x=19+2

=>3x=21

=>x=21:3

=>x=7

Vậy x=7

Answer 6

3x - 2 = 19

3x = 19 + 2

3x = 21

x = 21 : 3

x = 7