Solve, using the substitution method.

y + 2x = 7
14 – 4x = 2y

A.

The solution is (1, 5)

B.

The solution is (21, 0)

C.

There are an infinite number of solutions.

D.

There is no solution.

Question

Solve, using the substitution method.

y + 2x = 7
14 – 4x = 2y
  
 
 

 
 

  

  A. 
 
The solution is (1, 5)
   
   

 
 

  

  B. 
 
The solution is (21, 0)
   
   

 
 

  

  C. 
 
There are an infinite number of solutions.
   
   

 
 

  

  D. 
 
There is no solution.<<<<I Think?

thesmartone · Answer

wrong

anonymous · Answer

I think you're right, but i'm not sure :)

thesmartone · Answer

Look at the graph, the two lines are on top of each other. https://www.desmos.com/calculator/2iv2nqdgjh So what does that mean?

anonymous · Answer

@TheSmartOne im having trouble with the same thing. Could you explain plz?

anonymous · Answer

infinite?

thesmartone · Answer

When the two lines coincide, that means they have infinity solutions.

That means you can plug in any point and it will work for both equations! :)

anonymous · Answer

thanks :) @TheSmartOne it helped a lot! :)

thesmartone · Answer

Anytime! @abi_carter :)