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If < AOB = 4x +12 and

If < AOB = 4x +12 and-example-1

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We know that the angle
4x+12=3x+20Soving this equation


\begin{gathered} 4x+12=3x+20 \\ 4x-3x=20-12 \\ x=8 \end{gathered}

Then the value of x is 8.

User Hoa Nguyen
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