Weekly Quiz 12/3: Algebra

Solve:
12x - 4y = 20  ,  for   y 

• y = 3x - 5
• y = -3x + 5
• y = -3x - 5
• y = 3x + 5

Solve the equations:

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

• 4

• 3

• 2

• 1

Solve the equation:
3(x - 1) = 2x + 9

• x = 12
• no solution
• x = 10
• x = 6

Solve the equation by first clearing fractions:
⅛x + ¼ =⅝

• x = 1/8
• x = 4
• x = 3
• solution not listed

• 30
• 43
• 46
• 54

What is the first step to solve this equation?

• Move all the variables to one side.

• Move all the constants to one side.

• Find the least common denominator.

• Plug in a number for X.

5x + 3y + 5 + 4x + 3y + y + 8

• 9x + 7y + 13
• 6x + 2y + 2
• 25x + 2y + 3
• x + 7y + 12

Simplify the following expression:
3 + 5x + 8 - 2x

• -3x² - 11
• 3x² + 11
• 11 - 3x
• 11 + 3x

What is the first step in solving the following equation? $3x-5=20$  

• multiply both sides by 5

• add 5 to both sides

• divide both sides by 5

• subtract both sides by 5

Solve for x.

 $9x-7=-7$  

• 4

• 0

• 5

• -1.56