Marta gasto $60 en la compra de cuadernos iguales si cada cuaderno hubiera costado $2 más marta hubiera adquirido 80 cuadernos menos por los mismos $60 ¿cuántos cuadernos compró marta?

Step-by-step explanation:

The question in English is

Martha spent $60 to buy the same notebooks if each notebook had cost $2 plus Martha would have bought 80 fewer notebooks for the same $60. How many notebooks did Martha buy?

Let

x -----> the cost of each notebook

n -----> number of notebooks that Marta bought  

we know that

-----> -----> equation A  

substitute equation A in equation B and solve for x

Multiply by x both sides to remove the fraction

Using a graphing tool

Solve the quadratic equation

The solution is

x=$0.581

see the attached figure

Find the value of n

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