My father is 27 years old. Four years later, my father is four times as old as my son. How old is my father now?

My father is 27 years old. Four years later, my father is four times as old as my son. How old is my father now?

Let the son be x years old and the father be 27 + X years old
4*（X+4)=27+X+4
4X-X=27+4-16
3X=15
X=5
5+27=32
My father is 32 now

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