1.) Write an expression to represent the number of balloons Aurora sold. 2.) Write another expression to represent the number of balloons Saavi sold.

3.) Write an expression that represents how many balloons all three girls sold together.

4.) If each balloon costs $2 and altogether Cora, Aurora and Saavi made $900, write an equation to represent the total sale.

5.) Solve the equation you wrote in #4 to find the value of the variable, b.