Math 8 LT #7-8

Solving Equations

100

Solve for x:
72.6 - 3x = 87

x= -4.8

200

Solve for x:

2/5x-1=3

x = 10

300

Solve for x:

4(x + 1) - 2 = -6

x=2

400

Solve for x:
x - 4(5 - x) = -60

x = -8

500

3(x + 4) - 2(2x + 3) = -4

x = 10

Adding/Subtracting Expressions

100

Simplify the following expresion by adding the expression: 

(4x + 8) + (3x - 9)

7x - 1

200

Simplify the expression by adding the expressions: 

(-5x +7) + (3x + 3)

-2x + 10 

300

Simplify the expression by adding the expressions:

(8x+ 4) + (3y + 2)

8x + 3y + 6

400

Simplify the expression by subtracting the expressions:

(3x +8) - (2x -5)

x + 13

500

Simplify the expression by subtracting the expressions:

(7x + 8) - (4x + 3)

3x + 5

Evaluating Expressions

100

Evaluate the expression: 

2x + 5 when x = 3

11

200

Evaluate the expression: 

3x² + 2x - 3 when x = 2

13

300

Evaluate the expression: 

2b² + 3b - 6 + b² + 3 when b = 5

87

400

Evaluate the expression:

x - y - y + x - x when x = 4 and y = -7

18

500

Evaluate the expression: 

x(4 + x) - yx when x = 5 and y = 6

15

Distributive Property

100

Simplify the following expression by distributing and adding/subtracting the following expressions: 

4(3x + 3) + (9x + 3) 

21x + 15

200

Simplify the following expression by distributing and adding/subtracting the following expressions: 

-5(3x - 8) 

-15x +40

300

Simplify the following expression by distributing and adding/subtracting the following expressions: 

3(2x +4) - 5 

6x + 7

400

Simplify the following expression by distributing and adding/subtracting the following expressions: 

5(3x+4) + 8x + 7 

23x + 27

500

Simplify the following expression by distributing and adding/subtracting the following expressions:

3(2x + 5) - (3x + 6) 

3x + 9