X+y=180 x=180-y
x/y=8 x=8y
180-y=8y
180=9y
y=20
x=180-20=8*20=160
461-х=102
х=461-102
х=359
461-359=102
102=102
Ответ:х=359
<span>38736:(500000-499193)=48
</span>1)500000-499193=807<span>
2)38736:807=48</span>
1-2, 2- 0,960 3- ?, 4 -3,, 5-67/4, 6-11 2/8, 7 - 12 3/5 +7=19 3/5 21-19 3/5= 1 2/5