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 84) 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