Determine an Unknown Value

Determine the unknown value in the proportion.

Determine the unknown value in the proportion.

Determine the unknown value in the proportion.

What is the value of x?

• x = 5

• x = 1

• x =2

• x = 1/5

What is the goal when solving an equation?

• To make zero pairs

• To isolate the variable

• To justify my answer

Which model represents this equation?

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What is a variable?

• A number that represents an unknown value

• A letter that represents an unknown value

a letter standing in for an unknown number - example

b x 4 = 24

• variable

• exponent

• powers of 10

• factors

Use equivalent ratios to find the unknown value

• 3

• 5

• 30

• 35