1. 

   bileva New Member

   решите уравнения:х+3х+5=17 3.5х=2.2х=4.56

    

   bileva, 2 фев 2010

   #1
2. 

   andrewIP New Member

   х+3х+5=17
   4х+5=17
   4х=17-5
   4х=12
   х=12:4
   х=3
   3+3*3+5=17
   17=17
    
   3,5х+2,2х=4.56
   5,7х=4,56
   х=4,56:5,7
   х=0,8
   3,5*0,8+2.2*0,8=4,56
   4,56=4,56
    
    

    

   andrewIP, 2 фев 2010

   #2