SOLUTION: what number must be added to 100 and 20-the same to both-so that the answers are in the ratio 3:1?

SOLUTION: what number must be added to 100 and 20-the same to both-so that the answers are in the ratio 3:1?

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Question 954766: what number must be added to 100 and 20-the same to both-so that the answers are in the ratio 3:1?

Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
(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.

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