Question 633946
Denise's age is one year less than twice the age of her brother. If the difference of their ages is more than 4, what can you conclude about Denise's age?
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Equations:
d = 2b-1
d - b > 4
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Substitute for "b" and solve for "d":
d - [d+1)/2 > 4
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d - (d/2) - (1/2) > 4
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(d/2) > 9/2
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Denise's age > 9
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Cheers,
Stan H.
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