Answer:
14.3€
Step-by-step explanation:
Let:
[tex]C=Price\hspace{3}of\hspace{3}the\hspace{3}shirt\\P=Price\hspace{3}of\hspace{3}the\hspace{3}pants\\T=Total\hspace{3}cost[/tex]
Now, let's write the data provided by the problem, using algebraic notation.
The total cost of the clothes is 20€, so:
[tex]P+C=T\\\\P+C=20[/tex]
The price of the shirt is :
[tex]C=\frac{2}{5} P[/tex]
Replacing this value into the first equation:
[tex]P+\frac{2}{5} P=20[/tex]
Solving for P:
[tex]\frac{7}{5} P=20\\\\P=\frac{100}{7} \approx 14.3[/tex]
So, the price of the pants is 14.3€ and the price of the shirt is:
[tex]C+14.3=20\\\\C=20-14.3=5.7[/tex]
Translation:
Deja que:
[tex]C=Precio\hspace{3}de\hspace{3}la\hspace{3}camisa\\P=Precio\hspace{3}del\hspace{3}pantalon\\T=Costo\hspace{3}total[/tex]
Ahora, escribamos los datos proporcionados por el problema, usando notación algebraica.
El costo total de la ropa es de 20 €, entonces:
[tex]P+C=T\\\\P+C=20[/tex]
El precio de la camisa es:
[tex]C=\frac{2}{5} P[/tex]
Reemplazando este valor en la primera ecuación:
[tex]P+\frac{2}{5} P=20[/tex]
Resolviendo para P:
[tex]\frac{7}{5} P=20\\\\P=\frac{100}{7} \approx 14.3[/tex]
Entonces, el precio del pantalón es de 14.3 € y el precio de la camisa es:
[tex]C+14.3=20\\\\C=20-14.3=5.7[/tex]