" (8) `49x-57y=172;57x-49y=252`

Solve the following simultaneous equations : 49x - 57 y = 172 , 57 x - 49 y = 252

Solve the simultaneous equations: 49x + 51y = 499, 51x+ 49y = 501

Solve for x and y: 7x - 4y = 49 5x - y = 22

Solve for x and y : 7x - 4y = 49, 5x - 6y=57

Using elimination method, solve for x and y the following pair of equations : 7x-4y=49," "5x-6y=57

Factorise the using the identity a ^(2) -b ^(2) = (a +b) (a-b). 4x ^(2) - 49y ^(2)

Solve 7^(x-y)=49; 7^(x+y)=343

Find whether the following pair of linear equations has a unique solution. If yes, find the solution. 7x-4y =49 and 5x-6y=57

Simplify frac( 81 x^2 - 49y^2)(9x + 7y)

Factorise : 36x^(4) - 84x^(2)y^(2) +49y^(4)