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100

 n + 2 = 8 

n = 6

100

12=x - (- 5)

x = 7

100

66= -6y

y = - 11

100

z/6 =-12

z = -72

100

-4x=-16

x = 4


200

-11 = v + 3

v =-14

200

x - 8 = -11

-4

200

-6d = -30

d = 5

200

6=s/2

s = 12

200

x-(-3)=13

x = 10

300

f + 312 = 725

f = 413

300

34 = x - 40

x = 74

300

108 = 18c

c = 6

300

y/42=3

y = 126


300

x/10= - 5

x = -50

400

100 = -56 + x

x = 156

400

x - 64= - 8

x = 56

400

36 = 2/r

r =54

400

-14=a/2

a = -28

400

1/x = 8

x = 16

500

1/3 + x= 5

x = 4 2/3

500

x - 503=253

x = 756

500

1/12 x = 13

x = 156

500

r/81=4

r = 324

500

1/4x=24

x = 96