sierralinares sierralinares

23-09-2017
Mathematics

contestada

What is the solution to the system of equations here?

{x - y = 7
{2x + y = -1

How did you solve this?

Respuesta :

dpokharnaotzjgn dpokharnaotzjgn

24-09-2017

To get this, you have to use elimination which is to basically get rid of one of the variables:

Add the two equations to get :

3x=6
x=2

Then, plug in 2 for x to get y:

2-y=7
y=-5

Answer Link

Otras preguntas

Which unit can be used to express the concentration of a solution? (1) L/s (3) ppm (2) J/g (4) kPa

What is the largest possible product for 2 even integer whose sum is 32

A list of environmental issues is shown below. • Rabbits transported from Europe overrun and deplete farmlands in Australia. • Many areas in the southeastern Un

the scale on a map indicates that 1 inch on the map corresponds to actual distance of 100 miles. two cities are 4.7 inches apart on the map. what is the actual

What has changed when a gardener uses a lever to lift a rock, instead of lifting it by hand? A. More force is applied over a shorter distance. B. More fo

Which country has the most permissive law involving physician-assisted suicide in the world? the United States the Netherlands Russia Japan

how would you write 62.22 in expanded form

why is there stuff? this is a science question?

A library’s holdings include the following title: A Forgotten Kingdom, Being a Record of the results obtained from the excavation of two mounds, Atchana and Al

Base your answers to questions on the information below and on your knowledge of biology. A woman wanted to remove the dandelion plants from her lawn. She went