Asked by Anonymous
Sally's grandfather is 67 tears old.
Sally is 19 years old.
At what age will Sally be exactly one third of her grandfather's age?
How old will her granfather be then?
Sally is 19 years old.
At what age will Sally be exactly one third of her grandfather's age?
How old will her granfather be then?
Answers
Answered by
Bosnian
( 67 + x ) / ( 19 + x ) = 3 Multiply blth sides by ( 19 + x )
67 + x = 3 ( 19 + x )
67 + x = 3 * 19 + 3 * x
67 + x = 57 + 3 x
67 - 57 = 3 x - x
10 = 2x
2 x = 10 Divide both sides by 2
x = 10 / 2
x = 5
Salys age will be 19 + 5 = 24
Granfathes age will be 37 + 5 = 72
72 / 24 = 3
67 + x = 3 ( 19 + x )
67 + x = 3 * 19 + 3 * x
67 + x = 57 + 3 x
67 - 57 = 3 x - x
10 = 2x
2 x = 10 Divide both sides by 2
x = 10 / 2
x = 5
Salys age will be 19 + 5 = 24
Granfathes age will be 37 + 5 = 72
72 / 24 = 3
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