Answer
a. $v_x=1.667V$
b. $i_x=0.556A$
c. $P_{voltage\ source}=5.556W$
Work Step by Step
a. $10=v_x+5i_x$ so $v_x=10/6=1.667V$
b. $i_x=v_x/3=0.556A$
c. $P_{voltage\ source}=-10i_x=5.556W$
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