Explicación paso a paso:
7(3[(2x+5(x-5)] = 30(2x-1)
7(3[2x+5x-25)] = 60x - 30
7(21x-75) = 60x -30
184x - 525 = 60x -30
184x - 60x = 525 - 30
124x = 495
x = 495/124
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Explicación paso a paso:
7(3[(2x+5(x-5)] = 30(2x-1)
7(3[2x+5x-25)] = 60x - 30
7(21x-75) = 60x -30
184x - 525 = 60x -30
184x - 60x = 525 - 30
124x = 495
x = 495/124