Question 954766
(100+x)/(20+x)=3/1 Multiply each side by (20+x).
100+x=3(20+x)
100+x=60+3x Subtract (x+60) from each side.
40=2x Divide each side by 2.
20=x
ANSWER: To achieve a 3:1 ratio you must add 20 to 100 and 20.