26-02-2015
Mathematics

Answered

how to solve 2x+y=2 and x+y=-1

Verified Answer :

apologiabiology apologiabiology

26-02-2015

so
2x+y=2
x+y=-1

multiply secion equation by -1
-x-y=1

add to first equation

2x-x+y-y=2+1
x=3
subsitute
3+y=-1
subtract 3
y=-4

x=3
y=-4

Answer Link

Related Questions

The development of armies navies and weapons is called imperialism

Looking at the leading causes of death in low and highincome countries which causes would be classified as communicable or infectious diseases

How did the Jim Crow laws fortify and perpetuate or continue racial discrimination in the United States

Which words make up the adjective phrase in this sentence The junk pile beneath Jos bed is getting bigger every day a bigger every day b is getting bigger c ben

what area of egypt is known as upper egypt

Which sentence is correct Baseball is using a bat to hit the ball Baseball is where you use a bat to hit the ball Baseball is when you use a bat to hit the ball

90 of a number s 180 What is this number

Margots dad has 7 striped ties and 21 solid ties What is the ratio of striped ties to solid ties

what type of triangle has side lengths of 4 7 and 9

Which passage from Kennedys inaugural address is a metaphor