George is 5 times as old as his son. In 15 years , he will be only twice as old as his son. How old will his son be in 15 years?

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Answer 1 · 2018-05-06T21:29:45

#x=5# age of sun

#y=25# age of George

suppose :

y=age of the George

x=age of the George son's

since George is 5 times old than his son

#y=5x#

After 15 years he will be only twice as old as his son

#y+15=2(x+15)#

#y+15=2x+30#

#y=2x+15#

#5x=2x+15#

#3x=15#

#x=5# age of sun

#y=25# age of George