Solve for X
What's the Equation
Terminology
100

X: 5X = 20

What is 4

100

Sarah has $20, and she wants to buy a toy that costs X dollars. 

What is 20 - X?

100

"ax + b = c," where "a," "b," and "c" are constants.

What is a linear equation?

200

X: 8X = 64

What is 8

200

Jane's age is 4 years less than twice Tom's age. 

What is 2X - 4

200

The number that does not contain the variable.

What is a Constant?

300

X: X/3 = 9

What is 27

300

A car rental company charges $30 per day plus an additional $0.15 per mile driven. If a customer's bill is $75, how many miles (X) did they drive?

What is $75 = $30 + ($0.15 * X) 

300

The value or values of the variable that make the equation true.

What is a solution?

400

X: 2X - 7 = 11

What is 9

400

The sum of two consecutive even integers is 46. Find the smaller integer (X).

What is X + (X + 2) = 46 

400

 The process of moving all terms containing the variable to one side of the equation and constants to the other side to solve for the variable.

What is Isolate?


500

 X: 4X + 12 = 20

What is 2

500

A bakery sold twice as many croissants as muffins, and the total number of croissants and muffins sold was 36. If X represents the number of muffins sold, how many croissants were sold?

What is X (number of muffins) + 2X (number of croissants) = 36 

500

Operations that "undo" each other, such as addition and subtraction or multiplication and division.

What are Inverse Operations?