Question

2(1/2-x)-3(x-1/3)=7/2 

1/2 (x-2/3)-1/3(2x-3)=x

Answer 1

2(1/2-x)-3(x-1/3)=7/2 

⇒1+2x−3x+1= 7/2

 ⇒2x−3x= 7/2 -1-1

⇒−x= 3/2

=> x= -3/2

Vậy....

b) 1/2 (x-2/3)-1/3(2x-3)=x

     => x/2 - 1/3 - 2x/3 - 1= x

      => ( x/2-2x/3) - ( 1/3+1) =x

       => ( 3x/6 - 4x/6) -4/3 = x

       => -1x/6 -8/6 = x

       =>-1x-8= 6x

        6x = -1x-8

       => -1x-6x = 8

      => -7x = 8 

      => x = 8: -7 

       => x= -8/7

 

       

     

 

Answer 2

2(1/2 - x) - 3(x - 1/3) = 7/2

1 - 2x - 3x + 1 = 7/2

-5x = 7/2 - 1 - 1

-5x = 3/2

x = 3/2 : (-5)

x = -3/10

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1/2(x - 2/3) - 1/3(2x - 3) = x

1/2 x - 1/3 - 2/3 x + 1 = x

1/2 x - 2/3 x - x = 1/3 - 1

-7/6 x = -2/3

x = (-2/3)/(-7/6)

x = 4/7