Răspuns:
Explicație pas cu pas:
x+y+z = 2020
x/100 = y/52 = z/50
y = 52x/100 ; z = 50x/100
¹⁰⁰⁾x + 52x/100 + 50x/100 = ¹⁰⁰⁾2020
100x + 52x + 50x = 202000 =>
202x = 202000 => x = 202000/202 =>
x = 1000 ; y = 520 ; z = 500
x+y+z = 2020
x/3,5 = y/6,5 = z/91 =>
y = 6,5x/3,5 ; z = 91x/3,5 =>
³'⁵⁾x + 6,5x/3,5 + 91x/3,5 = ³'⁵⁾2020 =>
3,5x + 6,5x + 91x = 3,5·2020 = 7070 =>
101x = 7070 => x = 7070:101 => x = 70
y = 6,5·70/3,5 = 455/3,5 => y = 130
z = 91·70/3,5 = 91·20 = > z = 1820
