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[tex] \frac{5}{6} d = - 15[/tex]
First you have to simplify 5/6d to 5d/6 as shown below
[tex] \frac{5}{6} d = \frac{5d}{6} [/tex]
Then multiple both sides by 6 because you are trying to solve for d
[tex]5d = - 15 \times 6[/tex]
Multiply -15 and 6 to get -90
[tex]5d = - 90[/tex]
Divide -90 by 5
[tex]d = \frac{ - 90}{5} [/tex]
[tex]d = - 18[/tex]
Then if you check it, it will give you -15 as your answer
[tex] \frac{5}{6} \times - 18 = - 15[/tex]
[tex] \frac{5 \times - 18}{6} = - 15[/tex]
[tex] \frac{ - 90}{6} = - 15[/tex]
[tex] - 15 = - 15[/tex]
