" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x-10zł
x+y=9
100x+10y=10x+100y+90
x+y=9
100x+10y-10x-100y= 90
x+y=9 | * -90
90x-90y= 90
-90x-90y= -810
90x-90y= 90
- 180y= -720/ :180
y=4
W sumie ma:
4*100zł+ 5* 10zł= 450zł.
Mam nadzieję, że pomogłam ;).