Question

Tim x thoa man : -12.(x-5)+7.(3-x0) =5 .

Answer 1

- 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

Answer 2

-12x+60+21=5

-12x+81=5

-12x=-76

x=19/3         k nha