sgreenfield90 sgreenfield90

23-11-2017
Mathematics

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ray is 23 years older than his sister Carol. in 20 years he will be twice as old as Carol. how old is each of them now?

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23-11-2017

r = c+23

r+20 = 2(c+20)
(c+23)+20 = 2(c+20)
c+43 = 2c+40
c = 3 : r = c+23 = 26

Carol is 3 years of age, and Ray is 26 years of age.

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23-11-2017

Ray is going to be 86 and Carol is 43.
23+20=43 x 2=86
86/2=43

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