![Brain teaser - Number And Math Puzzle - pic puzzle of the day - -a + b - c + d = 0
-2a + b + c - 3d = 0
a + 2b - 3c + d = 0
2a + 3b + 4c - d = 0
a=? b=? c=? d=?](/brainteasers/brain-teaser-great-maths-puzzles-with-answers-pic-puzzle-of-the-day-5054989975c87f1a5a86c90.41286124.png)
pic puzzle of the day
-a + b - c + d = 0
-2a + b + c - 3d = 0
a + 2b - 3c + d = 0
2a + 3b + 4c - d = 0
a=? b=? c=? d=?
created by Niki99
![Brain teaser - Number And Math Puzzle - pic puzzle of the day - -a + b - c + d = 0
-2a + b + c - 3d = 0
a + 2b - 3c + d = 0
2a + 3b + 4c - d = 0
a=? b=? c=? d=?](/brainteasers/brain-teaser-great-maths-puzzles-with-answers-pic-puzzle-of-the-day-5054989975c87f1a5a86c90.41286124.png)
-a + b - c + d = 0
-2a + b + c - 3d = 0
a + 2b - 3c + d = 0
2a + 3b + 4c - d = 0
a=? b=? c=? d=?