Math Equations and Expressions

Solve for b:

.5b = 16 (Hint: .5b or 0.5b means half times the value of "b")

• 8

• 48

• 24

• 32

What is the first step when solving an equation?

• Isolate the variable

• Randomly guess and check

• Operate from left to right.

• Always subtract one side.

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

• Inverse operations

• math

• variable

• PEMDAS

What is the first step (after setting up your workspace) to complete when solving this equation?
10 - 3y = 4

• Add 10

• Subtract 10

• Add 3

• Divide by -3

Translate:

Five "more than" a number

• x + 5

• 5x

• 5 - x

• 5 divided by x

Translate:

Twelve less than a number. (Hint: "less than" means "subtract from."

• 12 - x

• x - 12

• 12x

• x + 12

Translate: 
Four times a number plus six IS 30.

• 4 + 6 = 30

• 4x + 6 = 30

• x + 4 times 6 = 30

• 30 = 4x

x − 57.6 = 24.3

• 81.9

• 57.6

• 33.3

• 24.3

Define a variable and write a verbal model and an equation. Then solve the equation and check the solution using substitution. Joella makes $12.75 per hour. This is $2.50 more than her younger sister makes per hour. How much does Joella's sister make per hour?

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Solve (just enter the number as your answer)

a - 97 = 125