Question

A)2 (× -3) = - 3 ( × - 3)
B)4 ( 5× - 3 ) - 64(3 -×) - 3 (12× - 4)=96
C)5(× +1) + 6 ( × + 2) = 9 (× + 3)

Answer 1

Bonsouri cher ami !

A)2 (× -3) = - 3 ( × - 3)
    2x - 6 = -3x + 9 
    2x + 3x = 9 + 6  
    5x = 15
x = 3 

B)4 ( 5× - 3 ) - 64(3 -×) - 3 (12× - 4)=96
     20x - 12 - 192 + 64x - 36x + 12 = 96 
      120x  = 96 + 192 
      120x = 288
           x = 2,4 


C)5(× +1) + 6 ( × + 2) = 9 (× + 3)
 
   5x + 5 + 6x + 12 = 9x + 27 
  11x - 9x = 27 - 17 
     2x = 10
x = 5 

A  Bientot