Chapter 7 Review

Adding Equations

100

5 + r = 20

r= 15

200

b + 58 = 68

b = 10

300

c + 19.36 = 40.18

c = 20.82

400

d + 3/4 = 7/8

1/8

500

3.1898 + a = 6.9821

a= 3.7923

Subtracting Equations

100

e - 5 = 17

e = 22

200

v-11= 3

v= 14

300

c - 9.3 = 12.4

c = 21.7

400

m - 1.75 = 0.6

m = 47/20 or 2 7/20

500

n - 5 1/2 = 6 1/2

n = 12

Multiplying Equations

100

4p = 20

p = 5

200

6r = 5/9

r = 5/24

300

12m = 144

m = 12

400

5.2z = 20.8

z = 4

500

9.9f = 257.4

f = 26

Dividing Equations

100

h/13= 39

h = 507

200

c/ 12 = 13

c = 156

300

r/90 = 1,350

r = 121,500

400

j/80 = 2

j = 160

500

p/100 = 10

p = 1,000