SOLUTION: When I was 8 years old my dad was 31, but now my dad is twice my age how old am i

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Question 944362: When I was 8 years old my dad was 31, but now my dad is twice my age how old am i
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
M=my age; D=Dad's age=M+23
2M=D Substitute for D
2M=M+23 Subtract M from each side
M=23 ANSWER I am 23 years old.