" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
--------- ----------
90 - 0 = 200 - 20
= 50 y-20
------- ---------
90 = 180
50 y - 20
---- ----------
9 = 18
50 x 18 = 9 . y - 20
900 = 9 . y-20
900/9 = y - 20
100 = y - 20
y = 100 + 20
y = 120 (a)