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26 August, 19:17

Angle E and angle F are vertical angles with m angle E = 5x + 10 and m angle F = 7x - 12

What is the value of X?

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  1. 26 August, 21:28
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    Vertical angles are always equal.

    So you can set the equation up like this:

    5x + 10 = 7x - 12

    Subtract 5x from both sides. Then Add 12 to both sides.

    22 = 2x

    Divide both sides by 2.

    11 = x
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