\[\boxed{\mathbf{243\ (243)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ 374 + x;\ \ \ x = 268:\]
\[374 + 268 = 642.\]
\[2)\ 374 - x;\ \ x = 268:\]
\[374 - 268 = 106\]
\[3)\ a + b + 988;\ \ \ a = 714;\ \ b =\]
\[= 569:\]
\[714 + 569 + 988 = 2271\]
\[4)\ a - 314 + 625 - c;\ \ \ a =\]
\[= 836;\ \ b = 442:\]
\[836 - 314 + 625 - 442 = 705\]
\[\boxed{\ \mathbf{243}.\ }\]
\[Пирожков - 70;\]
\[бутербродов - 20;\]
\[пирожных - 60;\]
\[сочников - 50.\]
\[60 - 20 = 40\ (пирожных) -\]
\[продано\ больше,\ чем\ \]
\[бутербродов.\]