ann111r ann111r
  • 14-12-2016
  • Mathematics
contestada

Solve the following system of equations. -3x-2y=1. -4x+9y=-22

Respuesta :

Apocrophon
Apocrophon Apocrophon
  • 14-12-2016
-3x-2y=1
-4x+9y=-22

-3x-2y=1
-3x=2y+1
x=(2y+1)
      -3

-4x+9y=-22
-4(2y+1)+9y=-22
     (-3)
(-8y+1) +9y=-22
    -3

(-8y+1) + (-27y) = +66
-35y+1 = 66
-35y = 65

y= -13/7 or -1.85714

-3x-2y=1
-3x-2(-13)=1
           7
-3x+(26)=1
         7
-3x=1-(26)
            7
-21x= 7-26
-21x=19
x = -19   or 0.90476
       21

So sorry about the delay.
Answer Link

Otras preguntas

What are enzymes also known as? What do enzymes do to biological reactions? What do we call the special shape on an enzyme molecule? What are enzymes made of? W
how are the themes and topics different
If you multiply a number by five and then subtract negative ten, the difference is negative thirty. What is the number?
Explain how engineers and scientists may work together to produce a protein in the lab.
The number 6 is halfway between 4.5 and 7.5.Answer the missing numbers below.The number 6 is halfway between 2.8 and .......The number 6 is halfway between -12
how do I solve this proportion?
what did henry hudson claim land for
How do you do this algebra question
How is carbon dioxide obtained?
Alex makes ceramic bowls to sell at a monthly craft fair in a nearby city. Every month, she spends $50 on materials for the bowls from a local art store. At the