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Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 3/5

Solve: x−1+3=7\sqrt{x-1} + 3 = 7.

  • A

    1010

  • B

    1515

  • C

    1717

    check_circle
  • D

    55

Explanation

x−1=4⇒x−1=16⇒x=17\sqrt{x-1} = 4 \Rightarrow x - 1 = 16 \Rightarrow x = 17.

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