Thursday, October 31, 2013

Solve for x and y 4x+ 5y = 10, 6x - 5y = 5.

We'll solve the system using the elimination
method.


We'll note the equations of the system
as:


4x+ 5y = 10 (1)


6x - 5y =
5 (2)


We'll add (2) to
(1):


4x+ 5y + 6x - 5y =
10+5


We'll eliminate like
terms:


10x = 15


We'll divide
by 5:


2x = 3


We'll divide by
2:


x =
3/2


We'll substitute the value of x into
(2):


6x - 5y = 5


6*3/2 - 5y =
5


9 - 5y = 5


-5y = 5 -
9


-5y = -4


We'll divide by
-5:


y =
4/5


The solution of the system
is: {(3/2 , 4/5)}.

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