Решите уравнение: 1) 12х - 35 + 7х =98 2)25(х+1) - 16 =59 3) 13(х + 6) - 72 =123 4) 77+8(х-5) =125 если всё правильно ! много !

1) 12х+7х -35 = 98
19х= 98+35
19х= 133
х = 7
2) 25(х+1) - 16 = 59
25х + 25 - 16 = 59
25х = 59+16-25
25 х = 50
х = 2
3) 13(х+6) -72= 123
13х+78 - 72 = 123
13 х = 123+72-78
13х = 117
х = 117: 13
х= 9
4)77+8(х-5) =125
77+ 8х- 40 = 125
8х = 125-77+40
8х = 88
х= 88:8
х= 8

12× +7 х = 98 + 35
19 X = 133
x = 133: 19
x = 7

25 x + 25 - 16 = 59
25 x =59- 25 +16
25 x =50
X= 2
13 X +78-72 =123
13 X =123 -78+72
13 X =117
X =117: 13
x=9

77 +8 x- 40 =125
8 x =125 -77+40
8 x =88
X =11