Translate into math and solve for x:

Six less than twice a number is 45.

Hint: How does "less than" work? Do you need parentheses? Where?

On scratch paper: Titus earns 17 dollars less than half of what Finn earns (take that!)

1. How could you write this mathematically (without using any words)? Is there more than one way?

2. If Finn earns $34, how much does Titus earn?

3. If Titus earns $10, how much did Finn earn?

I can represent relationships between quantities using variables, operators, and constants.

Vocabulary

Variable:

Operator:

Constant:

Examples

1. 32 more than a number

2. 58 less than a number

3. 8 times a number

4. The quotient of a number, n, and 5

5. The sum of 13 and twice a number, h

Yeah, but what about other phrases?

Another tip about writing mathematical expressions

What does it mean when you see something like this: 3x ? What about 3 · x ?

Get out your telepathy machines!

Complete these problems for a 3

Complete these problems for a 4

Complete these problems for a 5

Commonplace Journal

Variable: A symbol that represents the value of a variable quantity

Operator: A symbol that represents an operation such as addition, subtraction, multiplication, or division

Constant: A number with a fixed value