filou222 filou222

23-11-2014
Mathematics

contestada

Substitution methode:
y=2x-5
4x-y=7

I thought you do it like this:
4x-2x-5=7
2x-5=7
2x=12
x=6
But that's not right.. What did I do wrong?

Respuesta :

konrad509 konrad509

23-11-2014

It should be 4x-(2x-5)=7.

[tex]4x-(2x-5)=7\\ 4x-2x+5=7\\ 2x=2\\ x=1[/tex]

Answer Link

Otras preguntas

URGENT!! ILL GIVE BRAINLIEST! AND 100 POINTS

I NEED HELP ASAP PLSS

Each child goes there the development process from the prenatal to birth period

21.3.7 Quiz: Analyze The Story and Its Narrator Question 7 of 10 Why might an author choose to use a third-person narrator? OA. To tell the story from many diff

Case 1 A female phlebotomist works alone in an outpatient clinic. It is almost time for lunch when a patient arrives for a blood test. The phlebotomist is flust

Bagaimanakah British mendapatkan sokongan Raja-raja Melayu bagi menandatangani perjanjian Malayan Union?

How many hours must a kayak be rented for the total costs to be the same?

A chemist needs to create a 60% HCl solution. (HCl is hydrochloric acid. A "60% HCl solution" contains 60% HCl and the other 40% is water.) How much of a 85% HC

Why was the United States was not successful in giving right to free man and woman

Please help it’s urgent . Grade 11 homework