Course 2- Unit 4-5- Equations with Rational Numbers

Adding Equations with Rational Numbers

100

8.5= w -12 

w= 20.5

200

13.27= T - 24.45 

37.72

300

m- 5.8= 9.3 

m= 15.1 

400

x - 4/7 = 2/3 

26/21 or 1 5/21

500

Solve the following equation: t - 2/3= 25 3/4

26 5/12 

Subtracting Equations with Rational Numbers

100

x + 1/2= 5/6 

4/12 or 1/3

200

x + 2 1/2 = 10 1/2 

x=8

300

 Y + 3/4 = 9/10

Y= 3/20 

400

K + 13.105= 25.899

K= 12.794

500

C + 3 3/5= 4 1/4

C= 13/20 

Multiplying Equations with Rational Numbers

100

b/5= 43

b= 215

200

solve for x when x/3=7/8

21/8 or 2 5/8

300

2/3x= 18 

54/2 or 27 

400

4/5x = 15/20

x= 75/80 or 15/16

500

6/10N= 5 

N= 25/3 

Dividing Equations with Rational Numbers

100

30k= 900 

k = 30 

200

2b= 426

b= 213 

300

2z= 15.7 

z= 78.5 

400

3n= 15.3

n= 5.1

500

1/2N = 3/8 

N = 3/4