7х - 3 = 16807
7х = 16807 + 3
7х = 16810
х= 16810 : 7
х = 16810/7
7 • 16810/7 -3 = 16807
16807 = 16807
7х - 3 = 16807
7х = 16807 + 3
7х = 16810
х= 16810 : 7
х = 16810/7
7 • 16810/7 -3 = 16807
16807 = 16807