7х-25=45
7х = 45 + 25
7х = 70
х=10
130-4х=70
130 - 70 = 4х
4х = 60
х= 15
49-3х=34
49-34 = 3х
15 = 3х
3х=15
х=5
9х-89=55
9х=55+89
9х=144
х=16
74-8х=2
74-2=8х
72=8х
8х=72
х=9
7х-25=45
7х = 45 + 25
7х = 70
х=10
130-4х=70
130 - 70 = 4х
4х = 60
х= 15
49-3х=34
49-34 = 3х
15 = 3х
3х=15
х=5
9х-89=55
9х=55+89
9х=144
х=16
74-8х=2
74-2=8х
72=8х
8х=72
х=9