Question

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

x=4

bai nay o violympic vong 14 dung ko?

Answer 3

-12 * (x-5) + 7*(3-x)=5

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

=> (-12x-x) + (60+21) = 5

=> -19x+81=5

=> -19x=-76

=> x = 4