erinveri100 erinveri100
  • 02-02-2021
  • Mathematics
contestada

Solve the simultaneous equations
8x + 3y = 45
2x + 3y = 27

Respuesta :

kirabowen15
kirabowen15 kirabowen15
  • 02-02-2021

8x + 3y = 45 * -2
2x + 3y = 27 * 8

-16x - 6y = 90
16x + 24y = 216

24y = 216
y = 216/24
y = 9


8x + 3y = 45
8x + 3(9) = 45

8x + 27 = 45
8x = 45 - 27
8x = 18
x = 18/8
x = 2.25


Answer Link

Otras preguntas

An observer (O) spots a plane (P) taking off from a local airport and flying at a 23° angle horizontal to her line of sight and located directly above a tower (
- 6х + Зу = 15 solve for y?​
20x-3y = 4 and 3x -y = -5
Please help me with this! I will give 25 points and Brainliest if it is correct! Which ratio is equivalent to 4:5? A. 10/15 B. 4/10 C. 16/20 D. 15/ 8
What’s the answer pls
what is the answer to this... plz answer only if you are correct!
I don't know how to solve this.​
Eliza had been jealous of her performing partner, Star, ever since they were teenagers. Star thought that she was the better magician, even though it was perfec
What’s the answer pls
The sketch of this crayon represents an irregular polygon. Find the area of the figure. 21.75 cm²75 cm² 37.5 cm²40.5 cm²​