Корень 4 степени корень 18*72=((18*72)^1/4)^1/2=<span>((18*72)^(1/4+1/2)=1296^(3/4)=корень 4 степени из 1296^3=216</span>
8 2/5х + 3 5/9) : 4 1/6 = 1 1/3,
(42/5х + 32/9) : 25/6 = 4/3,
42/5х + 32/9 = 4/3 * 25/6,
42/5х + 32/9 = 50/9,
42/5х = 50/9 - 32/9,
42/5х = 18/9,
х = 18/9 : 42/5,
х = 18/9 * 5/42,
х = 5/21
0,53х-3,4=7,2
0,53х=7,2+3,4
0,53х=10,6
х=10,6/0,53
х=20
14х+х-6,75=24,6
14х+х=24,6+6,75
15х=31,35
х=31,35:15
х=2,09