Question

maria are o suma de bani. in prima zi cheltuie 50 la suta din suma iar a doua zi un sfert din rest . afla ce suma a avut Maria daca a doua zi i au ramas 120 lei

Answer 1

x= suma de bani
x/2= (jumatate prima zi)
x/2*1/4=x/8 (a doua zi)
x/2+x/8+120=x
se aduce la acelasi numitor (8)
avem
4x+x+960=8x
8x-4x-x=960
8x-5x=960
3x=960
x=960:3
x=320lei(suma de bani)
verificare:
320:2=160 (prima zi)
160:4=40 (a doua zi)
120 cei ramasi
160+40+120=320

Answer 2

50%100din120
5/10 •120=240lei