sn3 cs2
2cos $^{2}$ (180+x)
$\sqrt{\}$ 10-x=x-4
7 5/8 - 4 7/16
ratio of cost price that of marked price is 3:5 and ratio of loss to discount is 1:4. find the discount % given.
2x+5=19
10x-7x+3z+5u=6 -6x+8y-z-4u=5 3x+y+4z+11u=2 5x-9y-2z+4u=7 by computation of inverse of a matrix