shamimsumair shamimsumair
  • 01-12-2020
  • Mathematics
contestada

a) 2x + 5y = 12,4x + 3y = -4substitution ​

Respuesta :

safalpo565
safalpo565 safalpo565
  • 01-12-2020

let 2x+5y=12......... equation I

also,4x+3y=-4........ equation ii

now, multiply equation i by 2

we get,2(2x+5y=12)

or,4x+10y=24

now subtract i from ii

4x+10y=24

-4x+3y=-4

so,the answer be 7y=28

or,y=4

now putting the value of y in equation I we get,

4x+10y=24

or,4x+10.4=24

or, 4x=24-40

or, 4x=16

or,x=4

therefore, the value of x and y are 4and 4

Answer Link

Otras preguntas

There 430 people in wave pool. Write an inequality that represents how many more people p can enter the pool.
What would most likely occur if the body was unable to create and use ATP immediately?
Solving equations 6x+7=8x–13
Andrea is selling candles as a fundraiser. she spent $50 on supplies for making the candles. she plans to sell the candles for $10 each. her profit can be model
A rectangular box is to have a square base and a volume of 80 ft3. the material for the base costs 45¢/ft2, the material for the sides costs 10¢/ft2, and the ma
Maggie’s brother is 6 years younger than three times her age. The sum of their ages is 42. How old is Maggie?
Why might Seattle have more Starbucks coffeehouses than other large cities in Washington State
What three components make up a film camera?define each part.
A display of gift boxes has 1 box in the top row. 3 boxes in the next row, 5 boxes in the next row, and so on. there are 7 rows in all. how many gift boxes are
in which US state would you visit to meet Hyperion, the very tallest Redwood?