02-02-2015
Mathematics

contestada

2x -y=-1
3x-2y=1
elimination somebody do this for me

Respuesta :

Pandagirl Pandagirl

02-02-2015

-2(2x-y)=-1
3x-2y=1

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

-x=3 (x=-3)
(-3,__)

2(-3)-y=-1
-6-y=-1
-y=-1+6
-y=5
y=-5
so..(-3,-5)

Answer Link

02-02-2015

2x-y=-1 (1)
3x-2y=1 (2)
(1) * 2--> 4x-2y=-2 (3)
(3) - (2)
x= -3

sub x= -3 into (1)
2(-3)-y=-1
-6-y=-1
-y=5
y= -5

Answer Link

Otras preguntas

There are two ways of adding two square numbers to make 65. Write a different square number in each box. [ ] + [ ].

How do i find the greatest common factor of 150, 275, and 420 ??

Which words in this sentence are common nouns? Until the Spaniards brought cattle and sheep from Europe, the Aztecs had no dairy products. Choose all answers th

Which cell part converts food into energy that is usable by a cell?

16. The main reason self-confidence is important in human relations is because

Which words in this sentence are common nouns? Until the Spaniards brought cattle and sheep from Europe, the Aztecs had no dairy products. Choose all answers th

If five slices of pizza cost $5.50, how much do two slices cost? Ten slices? Half a slice ?

Translation: how long has it been?

can you simplify 25/4? if so, how?

How do I change 36 to 360