Question 98829


 1)  4k -3= 3k+4
   4k - 3k = 4 + 3
   k = 7

   check :

   (4 *7) -3
   = 28 - 3
   = 25

    (3*7) + 4
   = 21 +4
   =25


2) 5m + 3 = 3m +9
    5m- 3m = 9 - 3
    2m = 6
     m = 6/2 
     m = 3

check :

  (5*3) + 3
 = 15 +3
 = 18

  (3*3) + 9
 = 9 + 9
 = 18

3) 8 -x = 2x-1
    8 + 1 = 2x +x
    9 = 3x
    3 =x

  check :

    8 - 3 = 5
   
   (2 * 3) -1
   = 6 -1
   = 5