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solve using multiplication principle

Can someone help me solve this problem using the multiplication principle to solve, please? I'd really appreciate it.
-1/2x=-7/8
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$- \frac 12 x = - \frac 78$

Multiply both sides by -2

$-2\,\times \, - \frac 12 \, x\, = \,-2\, \times\, - \frac 78$

$(-2\,\times \, - \frac 12) \, x\, = \,(-2\, \times\, - \frac 78)$

Simplify and you're finished.

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