5920 - (782+305)
(4007 + 2784) - (45*23)
(6399-2748)+(462+746)
1) -3/5-1/5=-4/5
2) -1/3-2/3=-3/3=-1
3) -3/7-4/7=-7/7=-1
4) -1/4-5/7=-7/28-20/28=-27/28
5) -5/6-1/3=-5/6-2/6=-7/6=-1 1/6
6) -1/8-3/4=-1/8-6/8=-7/8
7) -4 3/8-2 1/4=-4-2-3/8-2/8=-6-5/8=-6 5/8
8) -6 1/2-3 5/7=-6-3-7/14-10/14=-9-17/14=-9-1-3/14=-10-3/14=-10 3/14
9) -9-3 5/9=-9-3-5/9=-12-5/9=-12 5/9
1. 1038 - <u />х = 602; х = 1038 - 602; х = 436
2. <u />х/3 + 236 = 749; х/3= 749 - 236; х/3 = 513; х = 513*3; х = 1539
3. 2789 - 3х = 1586; 3х = 2789 - 1586; 3х = 1203; х = 1203/2; х = 401