A)    5x - 15 + 8x =7x - 5 =
 
    13X -15= 7X-5
      6X=10 
     X= 10/6

B)   2X -4 - 3X + 1 = 4X =

    -x -3 =4x 
   -3 =5x 
     x= -3/5