305 * 3 - x = 809
915 - х = 809
х = 915 - 809
х = 106
10000 - а = 4008 * 3
10000 - а = 12024
а = 10000 - 12024
а =-2024
10007 * 2 - d = 10000
20014 - d = 10000
d = 20014 - 10000
d = 10014
945783 - 30009: x = 945780
30009 / х = 945783 - 945780
30009 / х = 3
х = 30009 / 3
х = 10003
305 * 3 - x = 809
915 - х = 809
х = 915 - 809
х = 106
10000 - а = 4008 * 3
10000 - а = 12024
а = 10000 - 12024
а =-2024
10007 * 2 - d = 10000
20014 - d = 10000
d = 20014 - 10000
d = 10014
945783 - 30009: x = 945780
30009 / х = 945783 - 945780
30009 / х = 3
х = 30009 / 3
х = 10003