Question

Решите равнение 20/x-18=18/x-20

Answer 1

$\frac{20}{x - 18} = \frac{18}{x - 20} \\ 20(x - 20) = 18(x - 18) \\ 20x - 400 = 18x - 324 \\ 20x - 18x = - 324 + 400 \\ 2x = 76 \\ x = 38$