x•10=45000
х=45000:10
х=4500
100•x=100000
х=100000:100
х=1000
x:100=4000
х=4000*100
х=400000
1000:x=1
х=1000:1
x+19=40
х=40-19
х=21
x-19=40
х=40+19
х=59
x•10=45000
х=45000:10
х=4500
100•x=100000
х=100000:100
х=1000
x:100=4000
х=4000*100
х=400000
1000:x=1
х=1000:1
х=1000
x+19=40
х=40-19
х=21
x-19=40
х=40+19
х=59
1000
400000
1000
21
59