49-(63-19)+4а=29 (56-7)/а =55-48 7+6а-282 = 49
49-44 +4а =29 49а = 7 6а = 282+49 -7
4а = -5 +29 7а = 49 6а = 324
4а = 24 а = 7 а=54
а=6
(14 + 7а)/7 = 42-37 (5а-25)/4 =29-24 9а -45 + 42 = 93 +48
14 +7а = 5 х 7 5а-25 = 4 х 5 9а = 45-42 +93 +48
7а = 35 -14 5а = 25 + 20 9а = 144
7а =21 5а = 45 а=16
а = 3 а=9
2)21/4-41/6+3/10=315/60-410/60+18/60= -77/60= -1 17/60
3)8/7:16/7=8/7*7/16=1/2
4) - 1 25/100*(-8/3)= -1 1/4*(-8/3)= -5/4*(-8/3)= 10/3=3 1/3