Question

(9x-21):3=2

53.(9-x)=53

Answer 1

(9x - 21):3=2

<=> 9x - 21 = 6

<=> 9x = 27

<=> x = 3

53.(9-x)=53

<=>9-x=1

<=>x = 8

 

Answer 2

X=8

Answer 3

\(\dfrac{9x-21}{3}=2\\ \Leftrightarrow9x-21=6\\ \Leftrightarrow9x=27\Leftrightarrow x=3\)

\(53\left(9-x\right)=53\\ \Leftrightarrow9-x=0\\ \Leftrightarrow x=9\)