Question

suma a doua numere este 23 pe 4,iar diferenta lor este 5 pe 4. aflati numerele

Answer 1

a+b=23/4
a-b=5/4
Le adunam:
2a=28/4
a=7/2
b=9/4

Answer 2

a+b=$\frac{23}{4}$ 
a-b=$\frac{5}{4}$=>  a=b+$\frac{5}{4}$=a=$\frac{4b+5}{4}$
a+b=$\frac{4b+5}{4} +b= \frac{8b+5}{4} = \frac{23}{4} =\ \textgreater \ 8b+5=23=\ \textgreater \ 8b=18/8+b= \frac{9}{4}$
a+b=$a+\frac{9}{4} = \frac{23}{4}=\ \textgreater \ a= \frac{14}{4} ==\ \textgreater \ a= \frac{7}{2}$