800/1050
800 2....1050 2
400 2....5025 5
200 2....1005 5
100 2....201 3
50 2......67 67
25 5......1
5 5
1
НОД (800;1050)=2*5*5=50
800/1050 = 16/21
X=2
<span>9^x-3*3^x=54
</span>(3^2)^3-3^x+1=54
3^2x-3^x*3=54
3^2x-3*3^x=54
t^2-3t=54
t=9
t=-6
3^x=3^2
x=2