Krista and Alexa played balloon darts in a school fair. Keisha 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.
b - 1 = ____
b = _____balloons
b - 1 = 6
b = 6 + 1
b = 7 balloons