Answer
$(a)$ $-6$
$(b)$ $-11$
Work Step by Step
$5x-6$
$(a)$ $x=0$
Replace $x$ with $0$ and evaluate the indicated operations:
$5(0)-6=-6$
$(b)$ $x=-1$
Replace $x$ with $-1$ and evaluate the indicated operations:
$5(-1)-6=-5-6=-11$
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