jika BC//DE dan AB//EF jika ABC = (4x-32) dan DEF (3x+16°) maka nilai x adalah
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[tex]4x - 32 + 3x + 16 = 180 \\ 7x - 16 = 180 \\ 7x = 180 + 16 \\ 7x = 196 \\ x = \frac{196}{7} \\ x = 28[/tex]