## Find $x$ from $xy = 12$, $yz = 20$, and $zx = 15$

**Problem**

Solve for *x* from the following equations:

$xy = 12$ | $yz = 20$ | $zx = 15$ |

A. 2 | C. 4 |

B. 3 | D. 5 |

**Problem**

Solve for *x* from the following equations:

$xy = 12$ | $yz = 20$ | $zx = 15$ |

A. 2 | C. 4 |

B. 3 | D. 5 |

**Problem**

Given the following equations:

$$ab = 1/8 \qquad ac = 3 \qquad bc = 6$$

Find the value of $a + b + c$.

A. $12$ | C. $\dfrac{4}{51}$ |

B. $\dfrac{7}{16}$ | D. $12.75$ |

Solve for the value of x from each of the following equations:

- 9
^{x}- 6(9^{-x}) - 1 = 0 - 2
^{x + 1}· 3^{x}= 5^{x + 3}

**Problem**

Solve for $x$ and $y$ from the given system of equations.

$\dfrac{3}{x^2} - \dfrac{4}{y^2} = 2$ ← Equation (1)

$\dfrac{5}{x^2} - \dfrac{3}{y^2} = \dfrac{17}{4}$ ← Equation (2)

**Problem**

Solve for $x$ and $y$ from the given system of equations.

$x^2y + y = 17$ ← Equation (1)

$x^4y^2 + y^2 = 257$ ← Equation (2)

**Problem**

Solve for *x* and *y* from the given system of equations.

$x + 2y = 6$ ← Equation (1)

$\sqrt{x} + \sqrt{y} = 3$ ← Equation (2)