1)7,8(-2,4а-1,3)-8,9(-1,9а+5,2)-3,58+1,81а= 2)-13,9(-8,4+5,2b)-10,7(6,8-9,5b)-29,37b-51=
Kisten
1)7,8(-2,4а-1,3)-8,9(-1,9а+5,2)-3,58+1,81а=-18,72a-10,14+16,91a-46,28-3,58+1,81a=-60
<span>
2)-13,9(-8,4+5,2b)-10,7(6,8-9,5b)-29,37b-51=
116,76-72,28b-72,76+101,65b-29,37b-51=-7</span>
5(2х+8)-(х+40)
10х+40-(х+40)
10х+40-х-40
9х
108/162=54/81
........................