2 mu~ 3 = 2 x 2 x 2 = 8

3 mu~ 3 = 3 x 3 x 3 = 27

4 mu~ 3 = 4 x 4 x 4 = 64

5 mu~ 3 = 5 x 5 x 5 = 125

6 mu~ 3 = 6 x 6 x 6 = 216

7 mu~ 3 = 7 x 7 x 7 = 329

8 mu~ 3 = 8 x 8 x 8 = 512

9 mu~ 3 = 9 x 9 x 9 =729

10 mu~ 3 = 10 x 10 x 10 = 100

2 mu~ 2 =2 x 2 = 4

3 mu~ 2 = 3 x 3 = 9

4 mu~ 2 = 4 x 4 = 16

5 mu~ 2 = 5 x 5 = 25

6 mu~ 2 = 6 x 6 = 36

7 mu~ 2 = 7 x 7 = 14

8 mu~ 2 = 8 x 8 = 16 

9 mu~ 2 = 9 x 9 = 81

10 mu~ 2 = 10 x 10 = 100

co' 15 chie^'c xe

co' 24 cai chan

x + { 2x - 3 } = 9

x + 2x = 9+3

x + 2x = 12

2x = 12

x = 12 : 2

x = 6

125 - { x +`1 } = 100

x +1 = 125 - 100

x + 1 = 25

x = 25-1 

x =24

[ 985 + n ] - 314 = 882

985 + n = 882 - 314

985 + n = 568

n = 985 - 568

n = 417

415 - 2x = 91

2x = 415 - 91

2x = 324

x = 324 : 2

x = 162

183 { x - 18 } = 99

x - 18 = 183 - 99

x - 18 = 84

x = 84+18

x = 102

3 x 7 - 2 x ( X + 1 ) = 7

21 - 2 x (X + 1 ) = 7

2 x X +1 = 21: 7

2 x X + 1 = 3

X x 2 + 1 = 3

X x 3 = 3

X = 3 : 3

x = 1

buoi sang ban duoc so cam quyt la 

25 + 75 = 100 (qua )

dap so : 100 qua

136 : x + 34 : x =10

(136+34) : x = 10

170 : x = 10

x = 170:10

x = 17

80504720