А)17x-9=648
17х=648-9
17х=657
х=657/17
Б)75-3x=30
-3х=30-75
-3х=45
х=45
В)9x+4=40
9х=40-4
9х=36
х=4
а)17x-9=648
8×x =648
x=81.
б)75-3x=30
3x=75-30
3×x=45
x=45÷3
x=15.
9x+4=40
9x=40-4
9×x=36
x=36÷9
x=4.
А)17x-9=648
17х=648-9
17х=657
х=657/17
Б)75-3x=30
-3х=30-75
-3х=45
х=45
В)9x+4=40
9х=40-4
9х=36
х=4
а)17x-9=648
8×x =648
x=81.
б)75-3x=30
3x=75-30
3×x=45
x=45÷3
x=15.
9x+4=40
9x=40-4
9×x=36
x=36÷9
x=4.