458200:790=580.
936600:420=2230.
166680:360=463.
835800:210=3980.
-4х+10=0
-4х=-10
х=2,5
-4х-7=0
-4х=7
х=-1,75
-5х-1=0
-5х=1
х=-0,2
-5х-9=3
-5х=3+9
-5х=12
х=-2,4
2х-7=6
2х=6+7
2х=13
х=6,5
4х+10=-10
4х=-10-10
4х=-20
х=-5
2х-10=-3
2х=-3+10
2х=7
х=3,5
2х+6=8
2х=8-6
2х=2
х=1
-2х-3=1
-2х=1+3
-2х=4
х=-2
-5х-9=-6
-5х=-6+9
-5х=3
х=-0,6
55 29/33 - 32 29/33 - 6 3/4 ÷27 ×7 5/7 - 20 5/21 +1 2/3 = 2 1/2
1/4×7 5/7=1/4×54/7=27/14 = 1 13/14
55 29/33-32 2933=1844/33 - 1085/33 = 759/33 = 23
23-1 13/14=23/1-27/14=(23 × 14 - 27 × 1)/14 = 322/14 - 27/14 = 295/14 = 21 1/14
21 1/14 - 20 5/21=295/14 - 425/21 =(295 × 3 - 425 × 2)/42 = 885/42 - 850/42 = 35/42 = 5/6
5/6+1 2/3=5/6+5/3=(5 × 1 + 5 × 2)/6 = 5/6 + 10/6 = 15/6 = 5/2 = 2 1/2
1) 8×120=960(м)-сколько он прошёл.
2) 960+960×9=960×10=9600(м)
Ответ: 9 км 600 м.