1. 15. 2\3 - х =9.2\7
47\3 - х = 65\7
х = 47\3 - 65\7
х = 329\21 - 195\21
х = 134\21
х = 6. 8\21
2. 7\9х +4 = 2\3х + 8
7\9х -2\3х = 4
7\9х - 6\9х = 4
1\9х= 4
х = 4 ÷ 1\9
х = 36
3. -52х + 101 = 119 -96х
96х - 52х = 119 - 101
44х = 18
х = 18 ÷ 44
х = 9\22
4. |2х| - 1 = 0
2х = 1 и 2х= -1
х = 1\2 и 2х = -1\2
5. 13( х -13)+ 14(14х - 2) = 11(3х - 11)+ 28+ (10х-21)
13х - 169 + 196х -28 = 33х - 121 + 28 + 10х -21
13х +196х - 33х - 10х= -121 -21+169
166х = 27
х = 27\166
6. -7.1\2m+2.2\3m+1\6m=1.3\4×(-2.1\3)+4.1\5× 2.5\6
15\2m+8\3m+1\6m =-(7×7)\(4×3)+(21×17)\(5×6)
45\6m+16\6m+1\6m= -49\12 + 357\20
62\6m = 1017\20 - 245\20
10.1\3m = 772\20
10.1\3m = 38.6
m =579\155 = 3.114\155
7. -(7\22+х)+ 3\11× (х-1\2) = -7\22 - х + 3\11× - 3\22
8\11х = 10\22
х = (10×11)\(22×8)
х = 110\176
х = 0.625
8. (х-2)\4 +(х+3)\8 =(8-х)\6
(6х-12)\24+(3х+9)\8 - (24-4х)\24 = 0
(6х+3х+4х-12+9-24)\8=0
(13х-27)\8=0
х = 27\13
х = 2. 1\13