ALGEBRA

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SUZY IS 10 YEARS OLDER THAN BILLY, AND NEXT YEAR SHE WILL BE TWICE AS OLD AS BILLY. HOW OLD IS SUZY NOW? HOW OLD IS BILLY?

  • ALGEBRA -

    S-10=B
    S+1=2(B+1)
    subtract the second equation from the first..
    -11=-b-2
    b=9
    S=19

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