Question

- 3 ( 3× - 42 ) = 2 ( 7× - 52 )

Answer 1

- 3( 3x - 42 ) = 2 ( 7x - 52 )

- 9x +  126 = 14x - 104

-9x - 14x =  - 104 - 126

- 23x =   - 230 . ( - 1 )
23x = 230
 x = 230 / 23
x = 10

S = { 10 }