<s>[INST] Formula help with this equation I don't know what the answer to this formula is, can someone please help me.
I've tried lots of things but getting no where.
If $x=\dfrac56+\dfrac{15}{18}-\dfrac{10}{12}$, then $(x-1)3=$ ?
 [/INST] \begin{align}
x&=5/6+15/18-10/12\\
x-1&=5/6+15/18-10/12- 3/3\\
(x-1)3&=(5/6+15/18-10/12- 3/3)3\\
(x-1)3&=3*5/6+3*15/18-3*10/12- 3*3/3\\
(x-1)3&=5/2+15/6-10/4- 3\\
(x-1)3&=5/2+5/2-5/2- 3\\
(x-1)3&=5/2- 3\\
(x-1)3&=5/2- 6/2\\
(x-1)3&=-1/2
\end{align}
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