lukesirotkinrobot557
lukesirotkinrobot557 lukesirotkinrobot557
  • 11-09-2021
  • Mathematics
contestada

A first number plus twice a second number is 2 Twice the first number plus the second totals 13
Find the numbers.

Respuesta :

nikitarijal80
nikitarijal80 nikitarijal80
  • 11-09-2021

Answer:

28/3 , - 11/3

Step-by-step explanation:

let the first number be x and second be y.

here,

1st case

x + 2y = 2

x= 2 - 2y ............(i)

2nd case

2x + y = 13

x = 13 - y / 2 .............(ii)

from equation i and ii

we get,

(2 - 2y ) 2 = 13-y

4 - 4y = 13 - y

4 - 13 = 4y - y

- 11 = 3y

y = - 11 / 3

now,

putting the value of y in equation( i )we get,

x = 2 - 2 * -11 / 3

=6 + 22/ 3

=28 / 3

Answer Link

Otras preguntas

Given: measure of angle KJ = 124°, measure of IC =38° Find: m∠CQJ, m∠LIJ.
Please help with this question
Need help! Kenny is walking at a constant speed of 3.5 miles per hour. How far can he walk in 6 hours?
The rivers that are labeled with the numbers 3 and 4 on the map above include the ____ and the ____ Rivers . A. Danube... Thames B. Rhine... Tagus C. Danube...
Because of the industrial revolution....The population, city size, transportation, and standard of living......
Which event officially triggered the US CIVIAL WAR ?
banks that are members of the federal reserve have the benefit of? earning dividends from stock in the federal reserve voting rights in the federal open marke
match the part of the wave to its definition
According to ____________, energy cannot be created or destroyed?
What is 980 times log (1)