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100

x+5=15

x=10

100

x-4=7

x=11

100

2x=16

x=8

100

a/12 = 3

a=36

100

x/7=0

x=0

200

x+12=33

x=21

200

x-16=35

x=19
200

5x=95

x=18

200

x/1.2 = 8

x=9.6

200

23.8=3.5x

x=6.8

300

x+233=235

x=2

300

x-202=361

x=563

300

7x=49

x=7

300

x/4=100

x=400

300

3x+2=11

x=9

400

x+17+5=84

x=62

400

x-21=70

x=49

400

10x=10,000

x=1,000

400

x/0.6=0.9

x=0.54

400

4+(x/3)=13

x=27

500
x+12+4+5=43

x=22

500

x-4-8=12

x=24

500

3x+6x=117

x=9

500

x/2.4=6

x=14.4

500

(5x-2x)/6 = 4

x=8