Find equations of the lines through the given point parallel to the given line and perpendicular to the given line. See Example $7.$

hoine line

$(\frac{7}{8},\frac{3}{4}),9x7y=0$

$($a$)$ through the glves point and purallel to the given line

$($b$)$ through the given point and perpendicular se the given line

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