[21-3y=7],[5y+y=9]

If a, b, c, are in A.P. find the value of |[2y+4, 5y+7, 8y+a],[3y+5, 6y+8, 9y+b], [4y+6, 7y+9, 10y+c]|

If X+Y=[[3,-5],[2,1]] and X-Y=[[-7,-1],[8,9]] , then the value of X is ?

If a,b,c are in A.P. find the value of: ||2y+4, 5y+7, 8y+a],[3y+5, 6y+8, 9y+b],[4y+6, 7y+9, 10y+c]]

If a, b, c, are in A.P, find value of triangle = |[2y+4,5y+7,8y+a],[3y+5,6y+8,9y+b],[4y+6,7y+9,10y+c]|

If a,b,c are in A.P, find value of |[2y+4,5y+7,8y+a],[3y+5,6y+8,9y+b],[4y+6,7y+9,10y+c]|

If a,b,c are in A.P, find value of |[2y+4,5y+7,8y+a],[3y+5,6y+8,9y+b],[4y+6,7y+9,10y+c]|

The simultaneous equations -3x + 4y = 7, 9/2 x - 6y = -21/6 " have " ………

Find the value of (x+y) ,if 3x+5y=9,5x+3y=7

If a ,\ b ,\ c are in A.P., find the value of |(2y+4, 5y+7, 8y+a),(3y+5, 6y+8, 9y+b),(4y+6, 7y+9 ,10y+c)| .

Using properties of determinant , find the value of |{:( 2y +4, 5y+7, 8y+a),(3y+5,6y+8,9y+b),(4y+6, 7y+9,10y+c):}| ,if a,b and c are in AP.