Equations in one variable

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5
• Subtract 5
• Multiply by 7
• Subtract 7

• -49
• 153/5
• 49
• 85

An equation is a math sentence that contains an____________ sign.

• variable

• equal

• operation

• inverse

What is the inverse operation of subtraction?

• Subtraction
• Multiplication
• Division
• Addition

What is the inverse operation of addition?

• addition

• subtraction

• multiplication

• division

What is the inverse operation of multiplication?

• addition

• subtraction

• multiplication

• division

What is the inverse operation of division?

• addition

• subtraction

• multiplication

• division

One-fourth of a number is -60.

• 4x = -60

• x = -60

53 is 1 more than twice the number of students in class.

• 53 = 2x -1

• 53 = 1 + 2x

• 53= 12x

What is the difference between an expression and equation?

• Expressions have an equal sign and equations do not have an equal sign
• Expressions do not have an equal sign and equations do have an equal sign
• There is not a difference
• Expressions do not have variables and equations have variables