решите уравнения:
12x-35+7x=98
25(x+1)-16=59
13(x+6)-72=123
77+8(x-5)=125

19х = 98+35
19х = 133
х = 133 : 19
х = 7

25х + 25 - 16 = 59
25х = 59+16-25
25х = 50
 х =50:25
х = 2

13х + 78 - 72 = 123
13х = 123 + 72 - 78
13х = 117
х = 117:13
х = 9

77 + 8х - 40 = 125
8х = 125 - 77 + 40
8х = 88
х = 88:8
х = 11