1.24/12*5=10(км)-Лесом
2.24-10=14(км)-Полем
Ответ: 14 км
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280и588(28)
36и63(3)
180и312(12)
1) 1/2-(+4)=1/2-4=1/2-4/1=1/2-8/2=-7/2=-3 1/2
2) -5/11-(-5/11)=-5/11+5/11=0
3) -5-(-2 1/3)=-5+2 1/3=-5/1+7/3=-15/3+7/3=-8/3=-2 2/3
4) -8-(-1/7)=-8+1/7=-8/1+1/7=-56/7+1/7=-55/7=-7 6/7
5) 1/6-(+3)=1/6-3=1/6-3/1=1/6-18/6=-17/6=-2 5/6
6) -5/12-(-4)=-5/12+4=-5/12+4/1=-5/12+48/12=43/12=3 7/12
7х+2х=3,528
9х=3,528
х=3,528:9
х=0,392
Проверка
7*0,392+2*0,392=3,528
7*0,392=2,744
2*0,392=0,784
2,744+0,784=3,528
3,528=3,528