1) (3 - 4/7) * х = 5 2/3
( 3*7 - 4) * х = 17/3
7
( 21-4 ) * х = 17/3
7
17 /7 * х = 17/3
х = 17 * 7 = 7/3 = 2 1/3
3 * 17
2) ( 1 5/6 - 3/8) * х = 2 1/12
(11/6 - 3/8) *х = 25/12
(11*4 - 3*3) * х = 25/12
24
( 44 - 9) *х = 25/12
24
35/24 * х = 25/12
х = 25 * 24 = 5 * 2 = 10/7 = 1 3/7
12 * 35 1 * 7
3) (5/8 -1/4) * 7 : х = 1/6
( 5 - 1*2) * 7 : х = 1/6
8
3 * 7 = 1 * х
8 6
21/8 = х/6
х = 21* 6 = 126 = 16
8 8
4) х * ( 11/12 - 1/4) = 3/8
х * ( 11 - 1*3) = 3/8
12
х * 3/12 = 3/8 (3/12 сократили и получилось 1/4)
1/4 х = 3/8
х = 3 * 4 = 12/8 = 1 4/8 = 1 1/2
8 * 1
5) х * (1 2/3 + 5/9) = 2/3
х * ( 5 *3 + 5) = 2/3
9
х * 20/9 = 2/3
х = 2 * 9 = 3/10 = 0,3
3 * 20