102* 2=204,241*2=482,324*2=648,244*2=488
1) 5 x =15
X=15:5
X=3
2) 12-x=6
X= 12-6
X= 6
240-180=60(по шоссе)
1,6-(1,6·25%)=1,6-0,4=1,2(расход бензина по шоссе на каждые 10км)
(180:10)·1,6=28,8литр
(60:10)·1,2=7,2литр
(28,8+7,2):2=18литр в средном
6+5/24+7+19/24-(6+19/23)-(5+9/23)=6+5/24+7+19/24-23*6/23+19/23-(5+9/23)=6+5/24+7+19/24-(138/23+19/23)-(5+9/23)=6+5/24+7+19/24-138+19/23-(5+9/23)=6+5/24+7+19/24-157/23-(5+9/23)=6+5/24+7+19/24-157/23-23*5/23+9/23=6+5/24+7+19/24-157/23-(115/23+9/23)=6+5/24+7+19/24-157/23-115+9/23=552*6/552+23*5/552+552*7/552+23*19/552+24 (-157)/552+24 (-124)/552=3312/552+23*5/552+552*7/552+23*19/552+24 (-157)/552+24 (-124)/552=
3312/552+115/552+552*7/552+23*19/552+24 (-157)/552+24 (-124)/552=552*7 == 3864:
3312/552+115/552+3864/552+23*19/552+24 (-157)/552+24 (-124)/552
=3312/552+115/552+3864/552+437/552+24 (-157)/552+24 (-124)/552=3312/552+115/552+3864/552+437/552+-3768/552+24 (-124)/552=3312/552+115/552+3864/552+437/552-3768/552+-2976/552=41/23