1) 3/15 - 2 7/25 = 30/150 -2 42/150 = -2 12/150 = -2 2/25
2)-2 2/25 : 1 2/25 = -52/25 : 27 /25 = - 52/27 = -1 25/27
3)-1 25/27 +1 4/13 = -1 325/351 + 1 108/351 = - 217/351
8*(a-7)-6*(a-4)=10
8a-56-6a+24=10
2a=42
a=21
294,794,494,222,292,444,792,472,772,724,744
<h3>Hello Friend,</h3>
10.000р-1.000р=9.000р (100%)
100:9000=90р - 1%
90*146=13.140=146.5% 146.5%-100%=46.5%