Question

решите уравнение:
(6x-4)(2x+5)-(4x-7)(3x-1)=67

Answer 1

( 6x - 4)( 2x + 5) - ( 4x - 7)( 3x - 1) = 67
12x² + 30x - 8x - 20 - ( 12x² - 4x - 21x + 7) = 67
12x² + 22x - 20 - ( 12x² - 25x + 7) = 67
12x² + 22x - 20 - 12x² + 25x - 7 = 67
47x = 67 + 27
47x = 94
x = 94/47
x = 2