5/13 < 7/13
1 < 7/6
11/15 > 8/15
8/9 (*2) 16/18 = 16/18
<span>3*(2х-14)=96
6x-42 = 96
6x = 96+42
6x = 138
x = 138/6
x = 23</span>
2,5bc - 2,5
k = 2,5
k - это коэффициент
198 + ( -19 ) + ( -75 ) = 104.
1) 198 + ( -19 ) = 198 - 19 = 179.
2) 179 + ( - 75 ) = 179 - 75 = 104.
Удачи))))