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Cindy's age is 5 years less than three times Roy's age. If Cindy is 16 years old, how old is Roy? A. 4 B. 5 C. 7 D. 15
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Dec 3, 2023
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Cindy's age is 5 years less than three times Roy's age. If Cindy is 16 years old, how old is Roy?
A. 4
B. 5
C. 7
D. 15
Mathematics
college
Neil Watson
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Work backwards. Cindy is 16 which is five years LESS. So do the opposite of subtract and add 16 and 5.
16+5=21
Then the problem says three TIMES less. The opposite of multiply is divide. So divide 21 and 3.
21 / 3= 7
Therefore the answer is C
Panopticoncentral
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Dec 6, 2023
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let cindy’s age = a
let Roys age = r
cindy’s age is 5 less than 3 times roy’s age, therefore, a= (3•r) - 5
a + 5 = 3r
r = (a + 5)/3
it is known cindy is 16, therefore sub a = 16
r = ((16) +5)/3
r = 21/3
r = 7
therefore rory is 7 years of age
Wgwz
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Dec 8, 2023
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Wgwz
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