" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
2y +x = 21
__________ _
-2x = -14
x = 7
x = 7 disubstitusikan ke 2y - x = 7
2y - 7 = 7
2y = 14
y = 7