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100

 n + 2 = 8 

n = 6

100

12=x - 5

x = 17

100

6 - 15 = 

- 9 

100

8x + 9x = 

17x

100

4x=16

x = 4


200

11 = v + 3

v = 8

200

x - 8 = 11

19

200

-27 + - 36 = 

-63

200

- 4x + 3 + 2x = 

- 2x + 3

200

x-3=13

x = 16

300

f + 312 = 725

f = 413

300

34 = x - 40

x = 74

300

 0 - - 54 = 

54

300

 14 + x - 25 = 

x - 11

300

-4 * 10 = 

-40 

400

100 = 56 + x

x = 44

400

x - 64=28

x = 92

400

14 + ( 9 - 25) = 

-2

400

 23x - 82 -15x + 34 = 

8x - 48

400

-96/8

x = -12

500

14 + x= 5

x =-9

500

x - 503=253

x = 756

500

- 10 + -43 + 27 = 

-26

500

3x + y - 2 + 4y + 10 = 

3x + 5y + 8

500

10x=50

x = 5