" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x+y/2=20
x=y+19
x+y/2=20 I*2
x+y=40
y+19+y=40
2y=40-19
2y=21I:2
y=10,5
x=10,5+19
x=29,5
29+11=40 40:2=20
29-9=11+9
20=20