Question

512 x- 4/15 x =0,51

Answer 1

$frac{5}{12}x - frac{4}{15}x = 0.51 \ \ frac{25}{60}x - frac{16}{60}x = 0.51 \ \ frac{3}{20}x = 0.51 \ \ x = 0.51 div frac{3}{20} \ \ x = 3.4$