Răspuns :
{[(0+56:2+56):2]+56}:2=
[{(28+56:):2]+56}:2=
(42+56):2=49
numarul este 49
[{(28+56:):2]+56}:2=
(42+56):2=49
numarul este 49
Fie x numarul
2[2(2x-56)-56]-56=0
2(4x-112-56)-56=0 desfacuram paranteza
2(4x-168)-56=0
8x-336-56=0
8x-392=0
8x=392 deci x =392:8 deci x=49
2[2(2x-56)-56]-56=0
2(4x-112-56)-56=0 desfacuram paranteza
2(4x-168)-56=0
8x-336-56=0
8x-392=0
8x=392 deci x =392:8 deci x=49