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[3 000-(50×2-80)] ×25-2097

Răspuns :

[3000-(100-80)]×25-2097=
=(3000-20)×25-2097=
=2980×25-2097=
= 74500-2097=
= 72403
[3000-(50x2-80)]x25-2097
[3000-20]x25-2097
2980x25-2097
74500-2097=72403