9,5х-5х+3,75=6,3
4,5х=6,3-3,75=2,55
х=2,55:4,5=0,566
2/5 = 0,4; 3/5 = 0,6; 3/2 = 1,5; 7/2 = 3,5; 2/4 = 0,5; 15/25 = 0,6: 18/12 = 1,5; 10/25 = 0,4; 4/8 = 0,5
1) 10/14 и 7/14
2) 21/60 и 4/60
3) 9/78 и 10/78
4) 64/88 и 55/88
5) 28/143 и 26/143
6) 9/66 и 4/66
7) 63/540 и 130/540 и 243/540
8) 2964/5985 и 441/5985 и 5795/5985
(х+296)*84=9758+16114
(х+296)*84=25872
(х+296)=25872/84
х+296=308
х=308-296
х=12.