Question

3×3/5x+4×10/21+1×1/2x+2×1/3

Answer 1

$= frac{9}{5} x+ frac{1}{2} x+ frac{40}{21} + frac{2}{3} = frac{18}{10} x+ frac{5}{10}x+ frac{40}{21} + frac{14}{21} =2,3x+2 frac{12}{21}$