[Risolto] N. 215

$\dfrac{9}{5}x+\dfrac{8}{15}x = x -\dfrac{3}{5}$

mcm = 15

$27x +8x = 15x-9$

$35x = 15x-9$

$35x-15x = -9$

$20x = -9$

$x= -\dfrac{9}{20}$

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(9/5 + 8/15 - 1)*x = - 3/5

(4/3)x = - 3/5

x = - 9/20

9x/5 +8x/15 -x = -3/5

x(9/5+8/15-1) = -3/5

x(27+8-15)/15 = -3/5

4x/3 = -3/5

x = -9/20