SOLUTION: 8. Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo? A) 8 B) 10 C) 12 D) 14

Question 106637: 8. Ricardo is 4 years less than twice as old as his sister. The sum of their ages is 20. How old is Ricardo?
A) 8
B) 10
C) 12
D) 14

Answer by HyperBrain(694) (Show Source): You can put this solution on YOUR website!
Let x= the age of the sister
____y=age of Ricardo

THen,
2x=twice the age of his sister
x+y=sum of their ages
IF Ricardo is 4 years less than twice as old as his sister,

If the sum of their ages is 20,

But,

Thus,

Solving for y,

Therefore, Ricardo is 12 yrs. old!

Power up,
HyperBrain!
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