salynabun
salynabun
17-08-2017
Mathematics
contestada
2.5y + 3x=7 5x - 2.5y = 5
Respuesta :
choixongdong
choixongdong
17-08-2017
2.5y + 3x=7 (1st)
5x - 2.5y = 5 re-write -2.5y + 5x = 5 (2nd)
2.5y + 3x=7 (1st)
-2.5y + 5x = 5 (2nd)
---------------------------add
8x = 12
x = 12/8 = 1.5
2.5y + 3x=7
2.5y + 3(1.5)=7
2.5y = 7 - 4.5
2.5y = 2.5
y = 1
answer
solution (1.5 , 1)
Answer Link
nesabug
nesabug
17-08-2017
If you put them together, +2.5y and -2.5y neutralize themselves while 5x and 3x become 8x.
2.5y + 3x = 27
5x – 2.5y = 5
8x = 32
x = 4
2.5y + 3x4 = 27
2.5y + 12 = 27
2.5y = 27-12
2.5y = 15
y = 15/2.5
y = 6
X = 4
Y = 6
Answer Link
VER TODAS LAS RESPUESTAS ( 76+ )
Otras preguntas
(Because, when, unless,14. Smoking is harmful to health. This warning is printed onevery pack people smoke tobacco and endangers theirlivessmokers also cause di
From what region does most of Canada's oil and natural gas come? Alberta C. British Columbia b. Saskatchewan d. Ontario a. Please select the best answer from th
The ineffectiveness of the articles of confederation was demonstrated during _____.answers:Shays's Rebellion the Americain Revolution the Civil war
Write a paragraph about depression. Not the Great Depression just depression in general I need information and other ideas what to put in my essay.
mark invested 125 he earned a simple interest of 3% per year on the initial investment if no money was added or removed from the investment what was the amount
Directions: Tell whether the following are characteristics of stocks or bonds. Write stock orbond1. A form of equity financing or raising money by allowing inve
in gravity what does the narrator realize by the end of the story
when A.B is minimum show ?
1. List at least three changes to society that occurred in Russia prior to World War II that weresimilar to those experienced by the remainder of Europe during
A pizza has a circumference of 60 cm. The pizza is divided in half so that there are two halves. "The circumference of my half pizza is 30cm" Jenny thinks. Is t
