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The sum of two numbers is 11. Twice the first number minus the second number is 7  Find the numbers.​

 Mar 16, 2021

Best Answer 

 #1
avatar+73 
+1

let's set up two equations, and define two variables. we'll go with x and y again.

 

here is the system of equations:

 

x + y = 11

2x - y = 7

 

again (assuming you are the same Guest who asked a similar question a couple minutes before), i will use elimination.

 

2x + 2y = 22

2x - y = 7

 

now, let's subtract these two equations.

 

3y = 15

y = 5

 

and again, let's solve for x by plugging in the y value in one of the initial equations.

 

x + 5 = 11

x = 11 - 5

x = 6

 

 

hope this helped! please let me know if you are confused about anything i did :)

 Mar 16, 2021
 #1
avatar+73 
+1
Best Answer

let's set up two equations, and define two variables. we'll go with x and y again.

 

here is the system of equations:

 

x + y = 11

2x - y = 7

 

again (assuming you are the same Guest who asked a similar question a couple minutes before), i will use elimination.

 

2x + 2y = 22

2x - y = 7

 

now, let's subtract these two equations.

 

3y = 15

y = 5

 

and again, let's solve for x by plugging in the y value in one of the initial equations.

 

x + 5 = 11

x = 11 - 5

x = 6

 

 

hope this helped! please let me know if you are confused about anything i did :)

euph0ria Mar 16, 2021

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