Plantear ecuaciones PORCENTAJES y depositos SECUNDARIA (2ºESO) incognita matematicas

If this video helped you and you want unicoos to continue growing, SUBSCRIBE, click "Like," and SHARE it. If you also join us at http://www.unicoos.com, it will be great! #seeyouinclass :-) For 2nd and 3rd year of SECONDARY SCHOOL, we will pose and solve two exercises with equations. In this case, they relate to profit percentages and fractions of the total. Here's the statement for one of them: "Luis took a trip in his car. On the first leg, he used 2/3 of the gas. On the second leg, he used 1/4 of what was left." If he ended up with 20 liters in the tank, how much gas did he start with? SOLUTION to the last exercise: The television cost €1,200 and the PC, €800. You can see other similar exercises in this section of the website http://www.unicoos.com/asignaturas/ma... or in this playlist http://www.youtube.com/course?list=EC... Follow me on: YOUTUBE    / unicoos   FACEBOOK   / unicoos   (Like) TWITTER   / unicoos   GOOGLE + http://www.gplus.to/unicoos WEB http://www.unicoos.com And if If you want to help me subtitle the videos in other languages, I would be infinitely grateful... http://www.amara.org/es/profiles/vide...