Question

1/х +1/3/4 х=7/12
1/х+1/4х=3/8
1/2х+7/5х=6 1/3

Answer 1

1/х +1 :3/4 х=7/12
34       1
---- х+ ----- х=712
34      34

74
----- х =712
34

(74*43)*х=712
73х=712
х=712:73
х=712*37
х=312
х=14

1/х+1/4х=3/8
44х+14х=38
54х=38
х=38:54
х=38*45
х=310

1/2х+7/5х=6 1/3
510х+1410х=193
1910х=193
х=193:1910
х=193*1019
х=103
х=3 13