Unit 4 Review

12k + 15 = 35 +2k

• k = 2

• k = 4

• k = -2

• k = -4

3 ( a + 22 ) = 12a + 30

• a = 8

• a = 2

• a = 4

• a = -2

3 ( x + 1 ) - 5 = 5x -2

• x = -1

• x = 0

• x = -2

• x = 1

4(2a + 3) = −3(a − 1) + 31

• a = 4

• a = -2

• a = -4

• a = 2

Level 2

Solve if possible:

2x + 1 = 2x - 1

• No Solution

• x = 0

• Infinitely Many Solutions

Level 2

Solve if possible:

3x + 15 = 3(x + 5)

• No Solution

• x = 15

• Infinitely Many Solutions

Level 2:

Determine whether the equation has one, no, or infinite solutions.

3x - 8 = 3(x - 4) + 1

• one

• no solutions

• infinite solutions

Level 2: Determine whether the equation has one, no, or infinite solutions.

5x + 6 = 2 + 3x

• one

• no solutions

• infinite solutions

Solve the system by substitution.
 
5x + 4y= −14
y =  −7x  −  15 

• (-2, -1)
• (1, -2)
• (-2, 1)
• (-1, -2)

x + 2y = 2
x = -4y + 2

• (-3, 0)
• (0, 2)
• (-3, -2)
• (2, 0)