А)
15 8/9 + x = 4 5/14 + 1 9/14
15 8/9 + x = 6
x = 6 - 15 8/9
x = - 9 8/9
б)
8 14/36 + x + 31/36 = 25 1/36
8 14/36 + x = 25 1/36 - 31/36
8 14/36 + x = 24 1/6
x = 24 1/6 - 8 14/36
x = 15 7/9
в)
х * 100 = 0,9042
х = 0,9042 : 100
х = 0,009042
г)
1000 * х = 0,8088
х = 0,8088 : 1000
х = 0,0008088