Question

1. Suma a doua numere este 5 intregi 3supra4, iar diferenta lor este 5 supra4.Aflati numerele.

2. Aflati un numar stiind ca 3supra16 din el este egal cu 9supra2.

Ajutor va rog. Dau si cel mai bun raspuns.

Answer 1

1. 
$a+b= 5 \frac{3}{4} =\ \textgreater \ a+b = \frac{23}{4}$
$a-b= \frac{5}{4} =\ \textgreater \ a= \frac{5}{4}+b = \frac{4b+5}{4}$
$\frac{4b+5}{4} + b= \frac{23}{4} =\ \textgreater \ 4b+5+4b=23=\ \textgreater \ 8b=18 =\ \textgreater \ b= \frac{18}{8} = \frac{9}{4}$
$a= \frac{4b+5}{4} = \frac{4* \frac{9}{4}+5 }{4} = \frac{14}{4} = \frac{7}{2}$

2. 
$\frac{3*a}{16} = \frac{9}{2} =\ \textgreater \ 6*a=16*9=\ \textgreater \ a= 24$

Answer 2

1. a+b=5*3/4
a-b=5/4 => a=5/4+b

5/4+b+b=15/4 => 2b=10/4 => b=10/8=5/4
a=5/4 + 5/4=10/4=5/2

2. a*3/16=9/2 => a=9*16/2*3=151/6