Răspuns :
x = pret
x + 15% · x = x · ( 1 + 15% ) = x·( 100% + 15% ) = 115% · x
25% · 115% ·x = ( 115 / 4) % · x
115% · x - ( 115 / 4) % · x = 1725
(3 · 115 /4 ) % · x = 1725 : 115
( 3 /4 ) % · x = 15
3x /4 = 15 ·100
3x /4 = 1500
x /4 = 500
x =4 · 500 = 2000 lei
Coroniţă+mulţumesc+5 steluţe ? :)
x + 15% · x = x · ( 1 + 15% ) = x·( 100% + 15% ) = 115% · x
25% · 115% ·x = ( 115 / 4) % · x
115% · x - ( 115 / 4) % · x = 1725
(3 · 115 /4 ) % · x = 1725 : 115
( 3 /4 ) % · x = 15
3x /4 = 15 ·100
3x /4 = 1500
x /4 = 500
x =4 · 500 = 2000 lei
Coroniţă+mulţumesc+5 steluţe ? :)
X-pretul initial
X+15%din x=y
Y-25%din y=1725
75y=172500
Y=2300
115x=230000
X=2000 lei
X+15%din x=y
Y-25%din y=1725
75y=172500
Y=2300
115x=230000
X=2000 lei