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Answer:
[tex]\frac{36 + a}{3a}[/tex]
Step-by-step explanation:
Since I have to assume a is part of the fraction. We will answer assuming /a is replaced with a/12 + 1/3
To write 12/a as a fraction we must multiply with a common denominator. Thus being 3/3.
[tex]\frac{12}{a}+ \frac{3}{3} +\frac{1}{3}[/tex]
Now to write 1/3 as a fraction with a common denom we must use a/a.
[tex]\frac{12}{a} *\frac{3}{3}+ \frac{1}{3} *\frac{a}{a}[/tex]
Then we want to write each expression with a common denominator of a * 3 and multiply by a factor of 1.
[tex]\frac{12 * 3}{a * 3} +\frac{1}{3}* \frac{a}{a}[/tex]
Then we want to multiply 1/3 and a/a.
[tex]\frac{12 * 3}{a * 3} +\frac{a}{3a}[/tex]
Then we reorder the factors of a *3.
[tex]\frac{12 * 3}{3a} +\frac{a}{3a}[/tex]
Next, we combine the numerators over the common denom.
[tex]\frac{12 * 3 + a}{3a}[/tex]
FInally, we multiply 12 by 3.
[tex]\frac{36 + a}{3a}[/tex]