1) 138/х + 57 = 126138/х = 126 - 57138/х = 69138 = 69хх = 138/69х = 2
2) 684 - 129/х = 254-129/х = 254 - 684-129/х = -430129 = 430хх = 129/430х = 0.3
3) 5.4х0.2 + 4.6х0.2 = 181.08х + 0.92х = 182х = 18х = 18/2х = 9
4) (3х + 0.8)7 = 9.821х + 5.6 = 9.821х = 4.2х = 4.2/21х = 0.2
5) 3200/(х-168) = 253200 = 25(х - 168)3200 = 25х - 420025х = 7400х = 7400/25х = 296
6) (х + 12)/86 = 11х + 12 = 11*86х + 12 = 946х = 946 - 12х = 934
1) 138/х + 57 = 126
138/х = 126 - 57
138/х = 69
138 = 69х
х = 138/69
х = 2
2) 684 - 129/х = 254
-129/х = 254 - 684
-129/х = -430
129 = 430х
х = 129/430
х = 0.3
3) 5.4х0.2 + 4.6х0.2 = 18
1.08х + 0.92х = 18
2х = 18
х = 18/2
х = 9
4) (3х + 0.8)7 = 9.8
21х + 5.6 = 9.8
21х = 4.2
х = 4.2/21
х = 0.2
5) 3200/(х-168) = 25
3200 = 25(х - 168)
3200 = 25х - 4200
25х = 7400
х = 7400/25
х = 296
6) (х + 12)/86 = 11
х + 12 = 11*86
х + 12 = 946
х = 946 - 12
х = 934