4x+5y=8-4x-3y=0

Question

i need to know what salotion can i show how i got the answer

 

 

 

 

 

 

 

 

 

Answer 1

set both equations equal to zero

 

4x + 5y = 0           8 - 4x - 3y = 0

 

Solve for x in the first equation

 

4x + 5y = 0

      -5y   -5y

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

      4x = -5y

       4       4

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

        x = -5/4 (y)

 

Insert the solution for x in the other equation and solve for y

 8 - 4x - 3y = 0

 

 8 - 4(-5/4 y) - 3y = 0

 

 8 + 5y       -3y = 0

 

 8 + 2y = 0

-8           -8

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

        2y = -8

         2      2

 

         y = -4

 

Then plug in your answer for y in the other equation to get the answer for x

x = -5/4 (y)

x = -5/4 (-4)

x = 5

 

So your answer is (5, -4) or x=5 and y = -4

 

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