" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x+y=420
8x+5y=2640
x=420-y
8(420-y)+5y=2640
x=420-y
3360-8y+5y=2640 / -3360
x=420-y
-3y=-720/ : 3
x=420-y
y=240
x=420-240
y=240
x=180