Review Questions on Solving Equations 2

What is the definition of a variable?

• The letter used to represent a quantity
• The little number or letter used to raise to a power
• The number in front of a variable
• The number with no variable

In this expression, 2x + 6y - 10, which are the coefficients?

• 2, 6, and -10
• x and y
• 2 and 6
• -10

Using the "opposite operation" to "undo" and isolate the variable when solving an equation is more commonly called...

• Inverse operations
• math
• variable
• PEMDAS

-4x + 1 = 21

• x=120
• x=5
• x=30
• x=-5

Solve:
7x - 3x - 8 = 24

• 8
• -8
• 3.2
• 4

Solve:
6(5x - 3) + 2 = 14

• 2
• .5
• -1
• 1

Solve:
7x + 19 = -2x + 55

• 4
• 14.8
• 8.2
• -4

The objective when solving an equation is to....

• isolate the variable.
• check the solution.
• guess and check.
• Combine Like Terms.

What is the main task when evaluating equations?

• to cancel numbers
• to isolate the variable

s + 42 = 75

• 33
• 117
• 36
• 43