" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
-3x+y=15 |x5| -15x+5y=75
-----------------(-)
17x = -68
x = -4
2(-4)+5y=7
5y=7+8
5y=15
y=3
x+y = -4 + 3 = -1