\[\boxed{\text{267\ (267).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[если\ x = 1:\]
\[\ y = 2 \cdot 1 + 7 = 9.\]
\[если\ x = - 20:\]
\[y = 2 \cdot ( - 20) + 7 = - 40 + 7 =\]
\[= - 33.\]
\[если\ x = 43:\]
\[y = 2 \cdot 43 + 7 = 86 + 7 = 93.\]