Equations & Inequalities

Letters that stand for numbers

• equations

• expressions

• coefficients

• variables

A statement that shows that two expressions are equal. Includes an equal (=) sign.

• expression

• equation

• variables

• inequality

the number that a variable is multiplied by, like 6 in the term 6z. Sometimes also referred to as a constant.

• coefficient

• variable

• isolate

• simplify

A combination of numbers, symbols and operations that show a certain value. Does NOT include any combination of equal to, less than, or greater than signs.

• equation

• variable

• inequality

• expression

Is the following an example of an equation, expression, or inequality?

4b+2c

• equation

• expression

• inequality

Is the following an example of an equation, expression, or inequality?

4y-9=17

• equation

• expression

• inequality

Is the following an example of an equation, expression or inequality?

7y-8 > 47

• equation

• expression

• inequality

Cancel out the effects of an operation by using the opposite operation on both sides of an equal sign to keep an equation balanced. If you see subtraction, use addition, and vice versa. If you see division, use multiplication, and vice versa.

• order of operations

• variable

• inverse operations

• expression

Which inverse operation would you complete to solve this equation?

x + 6 = 13

• Add 6 to both sides of the equation

• Add 6 to 13 only

• Subtract 6 from both sides of the equation

• Subtract 6 from 13 only

True or False: When solving an equation, we do the order of operations in reverse to isolate the variable.

• True

• False