" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x = -2y
2x -3y = 7
2(-2y) - 3y = 7
-4y - 3y = 7
-7y = 7
y = 7 : -7
= -1
x = -2y = -2 x -1 = 2