" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
b. 15a + 7b − 5c −11a − 12b + 13d = 15a - 11a + 7b - 12b - 5c + 13 d = 4a - 5b - 5c + 13d