Find the inverse of following matrices by using elementary column operations :
`[(7,8),(2,2)]`

Find the inverse of following matrices by using elementary column operations : [(-6,4),(2,-2)]

Find the inverse of following matrices by using elementary column operations : [(5,-2),(2,-1)]

Find the inverse of following matrices by using elementary column operations : [(5,-4),(-3,3)]

Find the inverse of following matrices by using elementary column operations : [(-3,5),(-4,5)]

Find the inverse of following matrices by using elementary column operations : [(costheta,-sintheta),(sintheta,costheta)]

Find the inverse of matrices using elementary column transformations: [(2,-1,4),(4,0,2),(3,-2,7)]