Variables

Front

What is a variable?

Back

A variable is a symbol, often a letter, that represents a number we don't know yet.

Front

What does the equation 3x = 12 mean?

Back

It means that 3 times a number (x) equals 12.

Front

How do you solve the equation x + 5 = 10?

Back

Subtract 5 from both sides to find x = 5.

Front

What is the solution to the equation 2y = 10?

Back

y = 5, because 2 times 5 equals 10.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value of the variable that makes the equation true.

Front

What is the equation for finding the value of n in 12 + n = 20?

Back

n = 20 - 12, so n = 8.

Front

What is an equation?

Back

An equation is a mathematical statement that shows that two expressions are equal.

Front

What does the equation 16 ÷ n = 2 tell us?

Back

It tells us that when 16 is divided by n, the result is 2.

Front

How do you find the value of x in the equation 18 + x = 21?

Back

Subtract 18 from both sides to find x = 3.

Front

What is the solution to the equation 3t = 15?

Back

t = 5, because 3 times 5 equals 15.