2[417(2x-5)] = 80
417(2x-5) = 80:2 = 40
2x-5 = 40:417 = 40/417
2x = 40/417+5 = 2125/417
x = 2125/417 : 2 = 2125/834
k mk nha
2 * [ 417 * ( 2x - 5 ) ] = 16 x 5
2 * [ 417 * ( 2x - 5 ) ] = 80
417 * ( 2x - 5 ) = 80 : 2
417 * ( 2x - 5 ) = 40
2x - 5 = 40 : 417
2x - 5 = \(\frac{40}{417}\)
2x = \(\frac{40}{417}+5\)
2x = \(\frac{2125}{417}\)
x = \(\frac{2125}{147}:2\)
x = \(\frac{2125}{834}\)