If-then equation

If 1/2 + 2/5s = s - 3/4

what is the value of s?

Correct answer:

s =  2.0833

Step-by-step explanation:

$$\begin{gathered} 1\mathrm{/}2+2\mathrm{/}5s=s-3\mathrm{/}4 \\ 1\mathrm{/}2+2\mathrm{/}5\cdot s=s-3\mathrm{/}4 \\ 12s=25 \\ s={\displaystyle \frac{25}{12}}\doteq 2.083333={\displaystyle \frac{25}{12}}=2\frac{1}{12}=2.0833 \end{gathered}$$

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