16-01-2015
Mathematics

contestada

I need help solving
x+y=4
2x+y=6

Respuesta :

apologiabiology apologiabiology

16-01-2015

x+y=4
2x+y=6
make first equation negative
-x-y=-4
add to first equation
2x-x+y-y=6-4
x=2

subsitute
x+y=4
2+y=4
y=2

or
x+y=4
subtract x from both sdies
y=4-x
subsitute 4-x for y in second equation
2x+4-x=6
x+4=6
x=2

Answer Link

Otras preguntas

What is the cultural context of the story "Civil Peace" by Chinua Achebe? A.The narrator of the story is a Bristish colonialist in charge of the Igbo region of

What does it mean when it says an interval of (0, 2pi)?

Orchid wants to retile your bathroom floor, which has an area of 40 square feet. She is deciding between two types of custom tiles. The square tile is 0.5 foot

electromagnetic force occurs when

Scientists use tissue cultures to study possible medicines that can be used to treat cancer patients. What is one benefit of this procedure? A) Patients do no

a = v/t. Solve for t

1. Which Native Americans farmed? Chinooks and Sioux Chinooks and Pueblos Sioux and Navajos Navajos and Pueblos 2. What conclusion can be drawn from this

Create a literal question that can be answered by this excerpt from Little Brother: He slammed his hand down on the desk and then pointed his finger at me. "Th

Which way do lines of longitude run and what do they measure?. A. Lines of longitude run east to west and measure places expressed in degrees north or south o

Is light made up of atoms and elements?•Explain the relationship between matter, atoms, and elements.. •Distinguish between elements and compounds.. •Describe m