Răspunsuri

2014-05-27T20:30:58+03:00
-7x+2x= 23-13
-5x=20
x= -4

-9x+3x=21 -39
-6x=-18
x=3
2014-05-27T20:31:45+03:00
1) 13-23=-2x+7x
-10 = 5x impartim ambii termeni la 5
x= 2

2) 39-21 = -3+9
18 = 6x impartim ambii termeni la 6
x=3
1 4 1