Решите уравнения: а) x+ 11/43=9/12

b) 21/34 - y=16/51

в) 21/78-a=4/39

г) x+36/155=45/62

д) 77/89+y=173/178

e) 19/21-a=14/210​

photomath в

А) х + 11/43 = 9/12
х + 11/43 = 3/4
х = 3/4 - 11/43
х = 85/172

б) 21/34 - у = 16/51
- у = 16/51 - 21/34
- у = - 31/102
у = 31/102

в) 21/78 - а = 4/39
7/26 - а = 4/39
- а = 4/39 - 7/26
- а = - 1/6
а = 1/6

г) х + 36/155 = 45/62
х = 45/62 - 36/155
х = 153/310

д) 77/89 + у = 173/178
у = 173/178 - 77/89
у = 19/178

е) 19/21 - а = 14/210
19/21 - а = 1/15
- а = 1/5 - 19/21
- а = 88/105
а = 88/105