Question
Mon June 18, 2012 By: Greeshma
pls solve the questions in  SUSTITUTION METH , ELIMINATION METH, CROSS MULTIPLICATION METH:
 
Q}1.  {x/a} - {y/b} = 0 & ax + by = a square + b square
 

Expert Reply
Wed June 20, 2012
We would request you to ask one question at a time. The answer to your first question is given below.
 
Substitution method:
From first equation, we have 
x/a - y/b = 0
This gives, x = ay/b
 
Putting this value of x in the second equation, we get,
ax + by = a2 + b2
a2y/b + by = a2 + b2
y(a2+b2/b) = a2 + b2
y = b
 
So, we get, x = ay/b = a
 
Thus, x = a and y = b is the solution of the given pair of equations.
 
 
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