Решите уравнение 1) (х+4/21) - 4/15=16/352) (х-8/19)-4/57=2/33) (х-8/9)+3/8=19/364) 3

1)х+4/21=16/35+4/15
х+4/21=48/105+28/105
х+4/21=76/105
х=76/105-4/21
х=76/105-20/105
х=56/105=8/15
2)х-8/19=2/3+4/57
х-8/19=38/57+4/57
х-8/19=42/57
х=42/57+8/19
х=42/57+16/57
х=58/57=1 1/57
3)х-8/9=19/36-3/8
х-8/9=38/72-27/72
х-8/9=11/72
х=11/72+8/9
х=11/72+64/72
х=75/72=1 3/72=1 1/24
4)х+1 1/12=3 1/5-1/4
х+1 1/12=3 4/20-5/20
х+1 1/12=2 24/20-5/20
х+1 1/12=2 19/20
х=2 19/20-1 1/12
х=2 57/60-1 5/60
х=1 52/60=1 13/15

5(x+4)-28=48
5x+20-28=48
5x-8=48
5x=48+8
5x=56
x=56/5