Question

6(x+23)=192

(x-105):21=15

Answer 1

\(6\left(x+23\right)=192\)

\(\Leftrightarrow x+23=32\)

\(\Leftrightarrow x=9\)

\(\left(x-105\right):21=15\)

\(\Leftrightarrow x-105=315\)

\(\Leftrightarrow x=420\)

Answer 2

6 ( x + 23 ) = 192

      x + 23   = 192 : 6

       x + 23   = 32

                  x = 32 - 23

                x   = 9

( x - 105 ) : 21 = 15

      x - 105       = 15.21

         x  - 105   = 315

                      x = 315 + 105

                      x = 420

Answer 3

1. 6(x + 23) = 192

<=> 6x + 138 = 192

<=> 6x = 192 - 138

<=> 6x = 54

<=> x = 9

2. (x - 105) : 21 = 15

<=> x : 21 - 105 : 21 = 15

<=> \(\dfrac{x}{21}-5=15\)

<=> \(\dfrac{x}{21}=15+5\)

<=> \(\dfrac{x}{21}=20\)

<=> x = 20 . 21 

<=> x = 420