Question 144434
{{{-5/6x = -7/8}}}
eliminate both minus signs, just to make it easier to read.
{{{5/6x = 7/8}}}
Then, "cross multiply"  That's a short way to eliminate the fractions.  Multiply one NUM by the other DEN, and set them equal.
5 times 8 = 6x times 7
40 = 42x
x = 40/42 = 20/21
That's all.