Question 299808
In the playoff game, the ball was carried by either Anderson or Brown on 21 plays. Anderson gained 36 yards and Brown gained 54 yards. If Brown averaged twice as many yards per carry as Anderson, then on how many plays did Anderson carry the ball? 
2 ( 36 / x ) = 54 / ( 21 – x ) 
How would i solve this equation?
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Equations:
Quantity: a + b = 21 plays
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Anderson average: 36/a
Brown average: 54/b
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Average Equation: 54/b = 2(36/a)
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Modify the Average Equation:
54a = 72b
a = (4/3)b

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Substitute for "b" and solve for "a":
a = (4/3)(21-a)
3x = 84-4a
7a = 84
a = 12 (# of times Anderson carried the ball)
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Cheers,
Stan H.
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