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Posted by on Wednesday, December 28, 2011 at 5:27pm.

Please explain how to solve this equation with substitution: The owner of a hair salon charges $20 more per haircut than the assistant. Yesterday the assistant gave 12 haircuts. The owner gave 6 haircuts. The total earnings from haircuts were $750. How much does the owner charge for the haircut? Solve by writing and solving a system of equations.

  • Math - , Wednesday, December 28, 2011 at 5:32pm

    o=A+21
    6o+12A=750

    put the first equation into the second.
    6(A+21)=12A=750
    now simplify, solve for A.
    Then, O=A+21

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