Question 121873
.2*800+X=.5(800+X)
160+X=400+.5X
X-.5X=400-160
.5X=240
X=240/.5
X=480g OF DYE NEEDS TO BE ADDED.
PROOF
.2*800+480=.5(800+480)
160+480=.5(1280)
640=640