Question

Daca :
X+y=1000
X-y=868
Atunci care este valoarea lui X si y?
Dau coroana!!!!

Answer 1

$x+y=1000 \\ x-y=868 \\ x=y+868 \\ y+868+y=1000=\ \textgreater \ 2y=132=\ \textgreater \ y=66 \\ x=1000-66=934 \\ BlackBook$

Answer 2

x+y=1000
x-y=868
2x=132; x=132/2; x=66
66+y=1000
y=1000-66
y=934