Question

if (a,b) is a point lying on the graph of the equation 5x+ay=9 then find a

Answer 1

equation= 5x+ay=9
putting the values of x and y
we get, 5a+ba=9
             a(5+b)=9
             a=9/(5+b)
               

Answer 2

The point lying on the line, satisfies the equation of the line ;

5x +ay -9 = 0

Replace x by a & y by b

5×a + a×b -9 = 0
a (5+b) = 9

a = 9/(5+b)
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