5/12 - у = 0,15
у = 5/12 - 15/100
у = 5/12 - 3/20
у = 25/60 - 9/60
у = 16/60 = 4/15
у = 4/15
------------------------------
4,65 + у = 7,8
у = 7,8 - 4,65
у = 3,15
------------------------
х - 3,2 = 2 7/15
х - 3 1/5 = 2 7/15
х = 3 1/5 + 2 7/15 = 16/5 + 37/15
х = 48/15 + 37/15
х = 85/15 = 5 10/15
х = 5 2/3
----------------------------
х + 5,65 = 7,8
х = 7,8 - 5,65
х = 2,15
----------------------------
4 7/12 - у = 2,5
55/12 - у = 25/10
у = 55/12 - 25/10
у = 275/60 - 150/60
у = 125/60 = 2 5/60
у = 2 1/12
<span>1)3 2/5-3/5+5 4/5=8 3/5
2)8 7/9-3 4/9+5 8/9= 10 11/9=11 2/9
3) 25 13/40-(24 13/40+19/40)=25 13/40-24 32/40=21/40
4) 24 9/11+8 7/11)-24 9/11=32 16/11-24 9/11=8 7/11
5) (4 17/30+52 29/30)-50 29/30=56 46/30-50 29/30=6 17/30
6) (4-1 2/7-)-(6/7+1 1/7)=2 5/7-2=5/7
7) (12 1/8-4 5/8+0)-6 7/8=7 4/8-6 7/8=5/8
8) (1 3/17+5 16/17)+(1 1/17+2 14/17)-5 12/17=6 19/17+3 15/17-5 12/17=5 5/17
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