alyxoxoxoxo3148 alyxoxoxoxo3148
  • 21-01-2021
  • Mathematics
contestada

If 9(1-x)=27y and x-y=-11/2 find the value of x+y.

Respuesta :

thebecks
thebecks thebecks
  • 21-01-2021

Answer:

x=-3.875

y=1.625

x+y=5.5

Step-by-step explanation:

Given:

9(1-x)=27y

x-y=-11/2

then:

x=y-11/2 OR 5.5

substitute:

9(1-[y-5.5])=27y

9-9[y-5.5]=27y

9-9y+49.5=27y

simplifying:

36y=58.5

y=1.625

x=1.625-5.5=-3.875

Proof:

x-y=5.5 then -3.875-1.625=-5.5 =-11/2

9(1-x)=27y then 9(1-(-3.875))=27(1.625) then simplified

9(4.875)=43.875  or 43.875=43.875

Answer Link

Otras preguntas

Use astronomical and orbit in one sentence
How much ko2 is needed to react with 75.0 l of carbon dioxide at –25˚c and 215 kpa?
Is it possible to have 24 credit hours in a year to transfer to a four year school !?:)))
Derek has 12 shirts in his closet. if 2 out of every 3 of these shirts are striped, how many striped shirts does derek have in his closet
The grater the viscosity of a liquid the slower it flows. true or false.
When were the apostles empowered to begin the mission of jesus?
Zorna weighs 96 lb her weight is 6 lb more than half of her father's weight. how much does her father weigh
if i am makimg 10 cents 1 hour how many will i make in 5 hours?
He was president of iraq from 1979 to 2003. he was in power during the persian gulf war and repressed independence movements of groups within iraq.
Your heart rate shows how many times your heart beats in _____. 15 seconds 4 minutes 30 seconds 1 minute