Răspunsuri

2014-08-06T10:55:08+03:00
A) x+y+z= 43

b) 5z+3x+4y =59-27

5z +3x +4y= 32

c) 3x-6y+1= 3(x-2y)+1

x-2y=52-13

x-2y= 39

2x-6y+1= 3*39 +1=  117 +1=118