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100

5=x+2

3

100

12=2x+2

5

100

5g+7g

12g

100

12=5w-2w

w=4
100

1=2r+3r+11

r=-2

200

10=x-5

15

200

10=y/4+2

32

200

20m-7m

13m

200

24=5g+7g

g=2

200

34=17k

k=2

300

12=3x

4

300

25=5y-10

7

300

2m+3m+4

5m+4

300

15=3m+2m

3=m

300

34=m+2m+1

m=11

400

3=x/6

18

400

63=7x-7

10

400

5k+10k-3

15k-3

400

20=5g+3g+4

g=2

400

12g+2g+4g

18g

500

220=11x

20

500

16=-2x+4

-6

500

12w-2w+15-7

10w+8

500

32=4f+2f+5+3

f=4

500

4g+9g

13g

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