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

A 1 digit number and a 3 digit number have a sum of 205. The same two number have a difference of 195, a product of 1,000 and a quotient of 40. What are the t

A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s , as shown in the figure . The stairs are angled at

When was World War I?

If the speed of an object is tripled, its kinetic energy will be

Can u paraphrase the quote ”let things take their course”

What is Sir Francis Drake hardships

Nadine can send or receive a text message for 15 cents or get an unlimited number for 5 dollars. Write and solve an inequality to find how many messages she can

.is a pot holder a conductor or a insulator

is it possible for a distance versus-time graph to be a vertical line?

two identical freight cars roll without friction towards each other on a level track. one car rolls 2 m/s the other 1 m/s. after the cars collide they couple an