sarareed52p67zkx sarareed52p67zkx
  • 02-04-2018
  • Mathematics
contestada



A first number plus twice a second number is 10. Twice the first number plus the second totals 32. Find the numbers.

Respuesta :

jesslevy
jesslevy jesslevy
  • 02-04-2018
First num= x ,second num=y

X+2y=10
2x+y=32

Use equation 1 in equation 2
X=10-2y

2(10-2y)+y=32
20-4y+y=32
-3y = 12
Y= -4

X+2(-4)=10
X=10+8
X=18

Firstnum = 18 , second num= -4
Answer Link
tiara143
tiara143 tiara143
  • 02-04-2018
Let first number be x
And the second number be y
Then, x + 2y = 10.
⇒ x = 10- 2y....(1)

Also, 2x + y = 32 ...(2)

From, equation (1) & (2) we get, 
2(10-2y) + y = 32

or 20 - 4y + y  =32
or 20 - 32 = 3y 
or y = 4

Therefore, x = 10- 2y
or x = 10-2*4
or x = 10 - 8
or x = 2
Therefore, the two numbers are 2 & 4
Answer Link

Otras preguntas

What is double one hundred and fifty?
Can your conscience mislead you?
Please helpi will give brainly
Social forces include _________ characteristics of the population and its culture.
what time will it be 2hours and 20 minutes from 11:15
describe four features of bacteria that enable them to survive in a wide variety of habitats
can ıget the solve of thıs questıon blease
Cameron has a clear container in the shape of a cube. Each edge is 9cms long. He found the volume of the container in cubic centimeters by multiplying the edge
Consider the events of the California Gold Rush. How would this event be described differently by a person who witnessed the discovery of gold at Sutter’s Mill
what is a nucleus localized transcription factor and what is its function?