(1/5x...)-10=5-4 tolong jawab titik titiknya

(1/5xn)-10 = 5-4
<=>-2x(-10n) = 1
<=>-10n= -1/2
<=> n= 1/2 / 10
<=> n= 1/2 x 1/10
<=> n = 1/20
   atau
<=> n = 0,05