7 х-9/12=35/84 2 х+7/17

=60/68

1) 7 х-9/12=35/84

7 х=35/84+9/12

7 х = (35+9*7) / 84

7 х=98/84

х=98/84:7

х=98/84*1/7

х=14/84

х=1/6

2) 2 х+7/17=60/68

2 х=60/68-7/17

2 х = (60-28) / 68

2 х=32/68

х=32/68:2

х=32/68*1/2

х=16/68

х=4/17

7 х - 9/12 = 35/84

588 х - 63 = 35

588 х = 63 + 35

588 х = 98

х = 98/588

х = 1/6