Linear Equations in One Variable

SAT Math· difficulty 4/5

A baker's profit is P(x)=2x30P(x) = 2x - 30 where xx is loaves sold. The break-even occurs at:

  • A

    15 loaves

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  • B

    10 loaves

  • C

    20 loaves

  • D

    30 loaves

Explanation

2x30=02x - 30 = 0x=15x = 15.

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