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Manuel Anselmo is ten times older than his son,Andrew,In 20 years,Manuel's age will be 4 more than twice Andrew's age.how old was he when Andrew was born?

Sagot :

Manuel Anselmo=10x
Andrew=x
10x+20=2(x+20)+4
10x+20=2x+40+4
10x+20=2x+44
8x=24
x=3
present age=30
andrew=3
subtract 3 from the father
Manuel=27(before andrew was born).
Hope this helps =)