4 3/10=4,3 8,05= 8 5/100 2 9/100=2,09
540:X=380:19
540:х=20
х=540:20
<span>х=27
</span>х6=18000+24
х6=18024
х=18024:6
х=3004<span>
</span>3480-х=2190:3
3480-х=730
х=3480-730
<span>х=2750
</span><span>
</span>х+2010=3001*4
х+2010=12004
х=12004-2010
<span>х=9994</span><span>
</span>