[1988, 1995]
(a) $+6$
(b) $-5$
(c) $-2$
(d) $+2$
Correct Answer: 2.(a)
Solution:
$\therefore(2 \times 1)+(2 \times x)+7(-2)=0$
or $2+2 x-14=0$ or $x=+6$.
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