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

Brian made 5 free throws at basketball practice. ethan scored 3 more than twice the number of free throws brian made. which equation could be used to find the n
Help needed!!! Greatly appreciated
What are the 3 ways a shapeshifter transforms in Mythology
Why is meiosis necessary in a sexual life cycle?
Geography has no effect on how people live. True or False
Help, theres a picture
Solve the system using the substitution method 4x+6y=8 3x+y=9
Heyy can you please help me posted picture of question
Comparing village life in america and Confederate girls diary
in which education savings plan is the value of the investment dependent on the performance of the stock market 529 college savings plan Stafford Loan Perkins L