Understanding equations and solutions

Front

What is an equation?

Back

A mathematical sentence stating that two expressions are EQUAL.

Front

What is the solution of the equation 2y = 30?

Back

y = 15.

Front

Which equation has x=9 as a solution? 4 + x = 12, 5x = 45, 2x = 20, x + 7 = 26

Back

5x = 45.

Front

What is the inverse operation of division?

Back

Multiplication.

Front

In the expression 8r − 3, what is the variable?

Back

r.

Front

What does it mean for two expressions to be equal?

Back

It means they have the same value.

Front

What is a variable in mathematics?

Back

A symbol used to represent an unknown value.

Front

What is the purpose of solving an equation?

Back

To find the value of the variable that makes the equation true.

Front

What is the first step in solving the equation x + 5 = 12?

Back

Subtract 5 from both sides.

Front

What is the solution to the equation 3x = 21?

Back

x = 7.