Question

( 3.x-5 ).2 = 20

Answer 1

\(\left(3x-5\right).2=20\)

\(\Rightarrow3x-5=20:2\)

\(\Rightarrow3x=10+5\)

\(\Rightarrow x=15:3\)

\(\Rightarrow x=5\)

Vậy x=5.

Answer 2

(3x-5)2=20

<=> 3x-5=20:2

<=> 3x-5=10

<=> 3x=10+5

<=> 3x=15

<=> x=15:3

<=> x=5

 tick đúng cho mình nhé !

Answer 3

(3x-5)2=20

3x-5=20:2

 3x-5=10

 3x=10+5

 3x=15

 x=15:3

 x=5

 Vậy x = 5