Log3<span> 18/(2+log</span>3<span> 2)=(log</span>3<span> 2 + log</span>3<span> 9)/(2+log</span>3<span> 2)=(log</span>3<span> 2+2)/(2+log</span>3<span> 2)=1
</span>
4/60=2/30=1/15
12/60=1/2
28/60=14/30=7/15
40/60=2/3
1)8 1/15-5 2/3=2 2/5
2)2 2/5*5/8=1 1/2
3)10 47/60-1 1/2=9 17/60
-27х+220=-5х
-22х=-220
х=10
7а=-310+3а
4а=-310
а=-77,5
-2х+16=5х-19
7х=35
х=5
25-3в=9-5в
16=-2в
в=-8
3+11у=203+у
200=10у
у=20
3*(4х-8)=3х-6
12х-24=3х-6
9х=18
х=2