" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2025 KUDO.TIPS - All rights reserved.
4x-y=-7 |×2| 8x-2y=-14 _
14y=26
y=26/14 = 13/7
y =a/-14
13/7=a/-14
13.-14=7.a
7a=-128
a=-128/7