find x, y, z 4x= 3y; 7y= 5z & x- y+ z= -46
4x = 3y so x = 3/4 y
7y = 5 z so z = 7/5 y
3/4 y - y + 7/5 y = -46
y=- 40
x = 3/4 y = -30
z= 7/5 y =-56
+36916 
