Krista and Alexa played balloon darts in a school fair. Krista popped 6 balloons, which is 1 balloon less than Alexa. Complete the working equation that represents the number of balloons, b, that Alexa popped and solve the equation. (1 point)

b − 1 = 

        b =  balloons

b - 1 = 6

b = 7 balloons