Substitution
Equivalent Expressions
Equations
100

n=2

n+3

5

100

2c+3c

5c

100

n+3=10

n=7

200

n=15


25-n

10

200

4n-3n+15

n+15


200

n-12=25

n=37

300

n=12


n/3


4

300

2(n-5)

2n-10


300

3n-5=10

n=5

400

n=0


2n+7

7

400

4c2+ 3c-c2-2c

3c2+c

400

6n-6=30

n=6

500

n=2.5


n/5 + 4.5

5


500

5(4m+.2)

20m+1

500

n/2 + 3=13

n=20