(7+7+7+7)*7+7 только так)
15 * 14 = 5 * 3 * 2 * 7 = 5 * 2 * 3 * 7 = 10*21 = 210
35 * 12 = 5 * 7 * 2 * 6 = 5 * 2 * 7 * 6 = 10 * 42 = 420
44 * 25 = 11 * 4 * 25 = 4* 25 * 11 = 100 *11 = 1100
75 * 16 = 25 * 3 * 4 * 4 = 25 * 4 * 3 * 4 = 100 * 12 = 1200
А)7x-x=-17-1
6x=-18
x=-3
б)-8х+х=-3+24
7х=21
х=3
в)24х+44-14=4х-10
24х-4х=-44+14-10
20х=4
х=5
г)2х+2-8=х+4
х=10
д)16х-24+7=8-4х-1
20х=-24
х=-1.2
А)7/25 = 0,28
б) 3/8 = 0,375
в) 8/125 = 0,064
г) 9 / 32 = 0,28125