Question

Heo mie(Help me)

Answer 1

Cóa ai cíu e hong:"(((

Answer 2

(12x-5)(4x-1) + (3x-7)(1-16x) = 81

<=>(48x² - 32x + 5) + (-48x² + 115x - 7) = 81

<=>83x - 2 = 81

<=>83x = 83 <=> x=1

Vậy x=1