document.write( "Question 1012058: In 1950 Roberto was four times as old as Juan. In 1955 Roberto was three times as old as Juan. How old was Roberto when Juan was born?\r
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\n" ); document.write( "In 1950 Roberto was four times as old as Juan. In 1955 Roberto was three times as old as Juan. How old was Roberto when Juan was born?
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Let Juan’s age, in 1950 be J
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document.write( "Then Roberto’s age, in 1950 was 4J
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document.write( "Therefore, difference in ages = 4J – J, or 3J
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document.write( "In 1955, Juan was J + 5, and Roberto was: 4J + 5
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document.write( "We then get: 4J + 5 = 3(J + 5)
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document.write( "4J + 5 = 3J + 15
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document.write( "4J – 3J = 15 – 5
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document.write( "J, or Juan’s age, in 1950, was: 10
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document.write( "Roberto’s age, in 1940, when Juan was born, was 3(10), or  \n" );
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