Question

Suma dintre un numar,,a,, si un numar,,b,,este 50.Suma dintre,,a,, si jumatatea lui,,b,,este 40.
Afla numerele,,a,,si,,b,,.

Answer 1

[tex]Raspuns:\\ a+b=50=>a=50-b\\ a+ \frac{b}{2} =40\\ 50-b+ \frac{b}{2} =40\\ 100-2b+b=80\\ 100-b=80\\ b=100-80\\ b=20\\\\ a=50-20\\ a=30.[/tex]

Answer 2

a+b=50
a+b/2=40
2a+b=80,b=80-2a
a+80-2a=50
a=30
b=20