Addition and Subtraction One-step equations

Front

What is a one-step equation?

Back

A one-step equation is an algebraic equation that can be solved in a single step by performing the same operation on both sides of the equation.

Front

How do you solve the equation 15 = n + 7?

Back

Subtract 7 from both sides: n = 15 - 7, so n = 8.

Front

What does the equation r + 12 = 25 represent?

Back

It represents that if you add 12 to r, the result is 25. To solve, subtract 12 from both sides: r = 25 - 12, so r = 13.

Front

How can you represent the problem: Charlie and Anthony together have 340 trading cards. If Charlie has 160 trading cards, how many does Anthony have?

Back

The equation is 160 + c = 340, where c represents the number of cards Anthony has.

Front

What is the solution to the equation n - 4 = 12?

Back

Add 4 to both sides: n = 12 + 4, so n = 16.

Front

How do you represent the problem: Matt's height is 4 inches less than Robert's height. Matt is 58 inches tall. How tall is Robert?

Back

The equation is r - 4 = 58, where r represents Robert's height.

Front

What is the first step to solve the equation n + 5 = 10?

Back

Subtract 5 from both sides: n = 10 - 5, so n = 5.

Front

What does it mean to isolate a variable in an equation?

Back

Isolating a variable means to manipulate the equation so that the variable is on one side by itself.

Front

How do you solve the equation 20 = m - 3?

Back

Add 3 to both sides: m = 20 + 3, so m = 23.

Front

What is the solution to the equation x + 9 = 15?

Back

Subtract 9 from both sides: x = 15 - 9, so x = 6.