Odpowiedzi

2010-03-18T15:31:35+01:00
(2x+3)/5=(2-x)/3 - x
3(2x+3)=5(2x-x)-x
6x+9=10x-5x-x
6x-10x+5x+x=-9
2x- -9 |:2
x= -9/2
x= -2½
2010-03-18T15:32:13+01:00
(2x+3)/5=(2-x)/3 - x /×15
3(2x+3) = 5(2-x) - 15x
6x + 9 = 10 - 5x - 15x
6x + 9 = 10 - 20x /=6x
9 = 10 - 26x / - 10
-1 = 26 x
1/26 =x