Răspuns :
x*40/100 =2x/5
2x/5+228 =x numitor 5
2x+1140 =5x
5x-2x =1140
3x =1140
x =380 lei
2x/5+228 =x numitor 5
2x+1140 =5x
5x-2x =1140
3x =1140
x =380 lei
x=suma de bani
40/100 x X=228
2/5x X=228
X= 228/2/5
X=228x5/2
X=114x5
X=570
40/100 x X=228
2/5x X=228
X= 228/2/5
X=228x5/2
X=114x5
X=570