Question

(5x-4) (2x+1) = (2x-7) (5x-8)

Answer 1

$(5x - 4)(2x + 1) = (2x - 7)(5x - 8) \\ 10 {x}^{2} + 5x - 8x - 4 = 10 {x}^{2} - 16x - 35x + 56$

Eliminas los "10x^2"

$- 3x - 4 = - 51x + 56 \\ 48x = 60 \\ x = \frac{5}{4}$