" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x+2y = 15......(2)
subtitusikan
x + 2 ( 9 - x ) = 15
x + 18 - 2x = 15
-x = -3
x = 3
y = 9 - x
= 9 - 3
= 6