Question

-12( x - 5 )+ 7( 3-x)=5

Answer 1

<=>-12x+60+21-7x=5

<=>-19x=-76

<=>x=-76 : -19

<=>x=4

Answer 2

- 12.( x - 5 ) + 7.( 3 - x ) = 5

=> - 12x + 60 + 21 - 7x = 5

=> ( - 12x - 7x ) + 60 + 21 = 5

=> - 19x + 81 = 5

=> - 19x = 5 - 81

=> - 19x = - 76

=> x = ( - 76 ) : ( - 19 )

=> x = 4

Vậy x = 4