" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
a + 2b + a + 3b = 25
2a + 5b = 25
U7 = 23
a + 6b = 23
a + 6b = 23 (x 2) 2a + 12b = 46
2a + 5b = 25 (x1) 2a + 5b = 25-
7b = 21
b = 3
a + 6b = 23
a + 6(3) = 23
a + 18 = 23
a = 5
U11 = a + 10b = 5 + 10(3) = 5 + 30 = 35