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.