corsi3541 corsi3541
  • 04-06-2021
  • Mathematics
contestada

A first number plus twice a second number is 4 twice the first number plus the second totals 11 find the number

Respuesta :

Ritmeks
Ritmeks Ritmeks
  • 05-06-2021

Answer:

6

Step-by-step explanation:

Let the first number be x

Let the second number be y

x + 2y= 4............equation 1

2x +y= 11............equation 2

From equation 1

x + 2y= 4

x = 4-2y

Substitute 4-2y for x in equation 2

2x + y= 11

2(4-2y) + y= 11

8-4y+y= 11

8-3y= 11

-3y= 11-8

-3y= 3

y= -1

Substitute -1 for y in equation 1

x + 2y= 4

x + 2(-1) = 4

x-2= 4

x = 4+2

x = 6

Hence the first number is 6

Answer Link

Otras preguntas

explain how you know that the quotient 47.3÷10×10 is equal to 47.3÷0.1
Find the best word to complete the sentence. 2. In recent years fear of skin cancer has increased, encouraging greater ___ from long hours in the sun. A. abstin
Derive the equation of the parabola with a focus at (−5, 5) and a directrix of y = -1.
How do octopus use Newton's third law of motion to escape from enemies
I an confused need help on number 6
what is 32.697 to the whole number
I an confused need help on number 6
Why was America important to both sides in the conflict between England and France, and what role did the Americans hope to play in the struggle?"
what is 10 to the 3rd power x n = 630
Which words in the sentence are the complete infinitive phrase? To read several good books is my goal for the next month. A. to read B. several good books C. to