the four have to add to 360 or E+F = 180
9x+12 +3x+24 = 180
12 x + 36 = 180
12 x = 144
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∠E and ∠F are vertical angles with m∠E=9x+12m∠E=9x+12 and m∠F=3x+24m∠F=3x+24 .
What is the value of x?
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