Question

ìm x biết 

2.(x-5)-3.(x+7)=14

ai giải nhanh nhất sẽ tik nha

Answer 1

<=> 2x -10 - (3x+21) = 14

<=> 2x - 10 - 3x - 21 - 14 = 0

<=> -x -45 = 0

<=> x = -45

Answer 2

     2.(x-5) - 3.(x+7) = 14

=> 2x - 10 - 3x + 21 = 14

=> (2x - 3x) + (-10 + 21) = 14

=> (-x) + 11 = 14

=> -x           = 14 - 11

=> -x           = 3

=> x            = -3

    Vậy x = -3

Answer 3

2 ( x - 5 ) - 3 ( x + 7 ) = 14

2x - 10 - 3x - 21 = 14

2x - 3x = 10 + 21 + 14

- 1x = 45

x = 45 : ( - 1 )

x = - 45

Answer 4

2.( x - 5 ) - 3.( x + 7 ) = 14

2x - 10 - 3x - 21 = 14

2x - 3x - 10 - 21 = 14

- 1x - ( 10 + 21 ) = 14

- 1x - 31 = 14

- 1x = 14 + 31

- 1x = 45

x = 45 : ( - 1 )

x = - 45