170 км - 17000000 см
17000000/8,5=2000000
Масштаб карты 1:2000000
<span>1,5х+2 1/3=2,5</span>
1,5х = 2 1/2 - 2 1/3
1,5x = 2 3/6 - 2 2/6 = 1/6
x = 1/6 : 1,5 = 1/6: 1 1/2 = 1/6: 3/2 = 1/6*2/3 = 1/9
-3(c-5)+6(c+3)=-3c+15+6c+18= 3c+33
80/48=1целых 32/48
1целых 32/48 = 1 целых 4/6 = 1 целых 2/3