# SOLUTION: Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo?

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 Question 68207: Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo?Answer by ptaylor(2048)   (Show Source): You can put this solution on YOUR website!Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo? Let x=Ricardo's sisters's age Then 2x-4=Ricardo's age Now we are told that the sum of their ages is 20 so our equation to solve is: x+2x-4=20 add 4 to both sides 3x=24 x=8-----------------------------------sister's age 2x-4=2(8)-4=16-4=12-------------------------Ricardo's age ck Twice his sister's age is 16---4 years less that twice her age is 12--- CK also 8+12=20 20=20 Hope this helps-----ptaylor