Kushashwa

@enno , there is -1 because : we had : (x-3.5)/2 = -.5 multiplying 2 both sides (x-3.5)/2 *2 = -.5 *2 x-3.5 = -1 and then you can proceed easily. if a/b = c then a = bc I hope it helped u though I helped u 1 year later :P