Question

tìm x thỏa mãn 12(x-5)+7(3-x)=5

 

Answer 1

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

12x - 60 + 21 - 7x = 5

5x + 39 = 5

5x = -34

x = -34/5

Answer 2

Ta có : 12(x - 5) + 7(3 - x) = 5

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

=> (12x - 7x) - (60 - 21) = 5 

=> 4x - 39 = 5

=> 4x = 44

=> x = 11

Answer 3

12-{x-5}+7{3-x}=5

12x-60+21-7x=5

{12x-7x}-{60-21}=5

4x-39=5

4x=44

x=11

Answer 4

Ta có : 12 ( x - 5 ) + 7 ( 3 - x ) = 5

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

=> ( 12x - 7x ) - ( 60 - 21 ) = 5

=> 4x - 39 = 5

=> 4x = 44

=> x =11

Answer 5

Ta có:12(x-5)+7(3-x)=5

           (12x-60)+(21-7x)=5

           12x-60+21-7x=5

            5x-39=5

             5x=44

             x=8,8