13.23*2=26.46
26.46-10.68=15.78
Ответ: 15.78
(а+в):2=13,23
а=10,68
(10,68+в):2=13,23
10,68+в=13,23*2
10,68+в=26,46
в=26,46-10,68
<span>в=15,78</span>
7/15 = 0.46666
1/33 = 0.03030
-5/9 = -0.55555
1/30 = 0.03333
-5/18 = -0.27777
1/45 = 0.02222