Question

Решить уравнение 7k+5 k-7
____ - ___ = 1
5 4

Answer 1

$frac{7k+5}{5} - frac{k-7}{4} =1 \ frac{4(7k+5)-5(k-7)}{5*4} =1 \ 28k+20-5k+35=20 \ 23k=35 \ k= frac{35}{23}$