When three variable quantities have a constant ratio, their relationship is called a direct variation. It is said that one variable varies directly as the other two vary. The formula for direct variation is , where is the constant of variation.
Solve the equation for , the constant of variation.
Find the Equation of Variation 25x+100y+175z+200w=2600 , 40x+120y+200z+240w=3040 , 40x+110y+190z+210w=2840