jordynb18 jordynb18
  • 01-12-2021
  • Mathematics
contestada

3x-9y=-7 ; 2y-6x=8 elimination

Respuesta :

DrRKD DrRKD
  • 01-12-2021

Answer:

x=-29/24

y=3/8

Step-by-step explanation:

3x-9y= -7 ---A

2y-6x= 8----B

multiply eq A by 2

6x-18y=-14

-6x+2y=8

Add both equations, so you eliminate x since 6x+(-6x) = 0

-18y+2y= -16y

-14+8=-6

so you have

-16y=-6

y=3/8

now substitute this back to eq B, (you can use eq A as well if you like)

2(3/8)-6x=8

3/4-6x=8

-6x=29/4

x=-29/24

Answer Link

Otras preguntas

What is the slope of a line that is perpendicular to a line whose equation is −2y=3x+7 ? Enter your answer in the box.
15 POINTS! HELP! Cindy hypothesizes that if she adds salt to a weak acid, then its pH will be lowered. She develops the following experiment to test her hypothe
Which is harder linear algebra or abstract algebra?
When does hypoxia start at low oxygen in humans?
The XYZ company is seeing it's worth declining at a rate of 3.2% per year. If the current worth is 2,300,000, what will the value be in 5 years? A.) about $1,95
aspiring and foundation in a sentence
Which common mineral is most resistant to both chemical and mechanical weathering?
The fact that the helixes of the dna strand are arranged in opposite directions gives dna its _____ characteristics.
What is the area under the normal curve between z = 0.0 and z = 1.79?
If each digit can be any number from 0 to 9 how many different credit numbers are possible