My question is 6x+4=100-2x what is the answer?

X=12. You get this by adding 2x on both sides and subtracting by 4... so you get 8x=96. Then you divide by 8 to get x=12

The x value for point B that is located ¼ the distance from point A to point C is -0.75. Point A which is (0,4) and point C (-3,5) are the given values in the problem. It is assumed that point A is 75% while point C is 25%.
To determine the x-value, 
¼(-3) + ¾(0) = -¾ = -0.75