BrainPop-equations with varibles

What is a variable?

• A number in a equation
• A letter representing an unknown number in an equation
• the symbols in an equtaion that aren't letters or numbers
• Any eqution with an equal sige

In the equation 2x + 3y = 19, what is the variable? Choose the best answer.

• x
• y
• =
• both x and y 

What branch of mathematics deals with equations with variables?

• algebra
• geometry
• calculus
• its not math

Which symbol is present in every equation?

• +
• =
  -
• x
• =

How do we figure out the value of a variable?

• add up all the numbers in the equation
• multiply the variables by itself
• isolate the variable on one side of the equal sign
• a variable has no value

How would you solve the equation 4x = 100?

• add 4
• subtract 4
• multiply 4
• divide by 4 

In the equation 2x + 3y = 19, what is the constant?

• 19
• x
• y
• =

Solve for x: 7x = 21.

• x = 1
• x = 2
• x = 3
• x = 4

solving this equation y – 11 = 25?

• y = 14
• y = 15
• y = 36
• y = 37

solve for j. 27 - j = 8

• j = 13
• j = 15
• j = 17
• j = 19