Question

the sum of two numbers is 15 and there diffrence is 7 what are those two nubers

Answer 1

Answer:

x= 11

y=4

Step-by-step explanation:

let the 2 numbers be x and y

x+y= 15

x-y = 7

add both equations

2x = 22

x= 11

y=4

Answer 2

Sum = 15

Difference = 7

x = larger number

y = smaller number

x + y = 15

x - y = 7

use the elimination method to eliminate the y variable, and then solve for x

add the two equations

x + y = 15

x - y = 7

------------------

2x + 0 = 22

solve for x by dividing each side of the equation by 2

2x = 22

2x / 2 = 22 / 2

x = 11

substitute 11 for the value of x in the first equation, and then solve for y

x + y = 15

11 + y = 15

subtract 11 from each side of the equation

11 - 11 + y = 15 - 11

0 + y = 4

y = 4

final answer:

x = 11

y = 4