`4. (5m+5n)/(7m+7n) 7. (x^2-9)/(x^2 + 6x+9)`

If (9x -5)/(7) + (6 -3x)/(2) =2 , then x = _____

If = log "" ( 5)/(7) , m = log ""( 7)/(9) and n = 2 ( log 3 - log sqrt5) , find the value of 7^(l+ m + n )

If l= log "" ( 5)/(7) , m = log ""( 7)/(9) and n = 2 ( log 3 - log sqrt5) , find the value of l+ m + n

Find each of the following products: (i) (x + 6) (x + 6) (ii) (4x + 5y) (4x + 5y) (iii) (7a + 9b) (7a + 9b) (iv) ((2)/(3) x + (4)/(5)y) ((2)/(3) x + (4)/(5) y) (v) (x^(2) + 7)(x^(2) + 7) (vi) ((5)/(6) a^(2) + 2) ((5)/(6) a^(2) + 2)

(x)/(2) - ( y )/(9) = 6, ( x) /( 7) + ( y ) /(3) = 5 .

(9x)/(7-6x)=2

Solve : (7m - 5n) - (- 4n - 11m)