Răspuns :
Răspuns:
x suma initala
[tex]\frac{40x}{100}+360.000[/tex] suma cheltuita
[tex]x-\frac{40x}{100}-360.000[/tex] suma ramasa
[tex]\frac{30x}{100}[/tex] suma ramasa din datele problemei
[tex]x-\frac{4x}{10}-360.000=\frac{3x}{10}\\x-360.000=\frac{7x}{10}\\10x-3.600.000=7x\\3x=3.600.000\\x=1.200.000[/tex]
Explicație pas cu pas:
Răspuns:
a=suma initiala
40%a+360000+30%a=a
(40a/100)⁽¹⁰+360000+(30a/100)⁽¹⁰=a
4a/10+¹⁰⁾360000+3a/10=¹⁰⁾a
7a+3600000=10a
3600000=10a-7a
3a=3600000 => a=1200000 lei suma initiala