Answer:
a = 12
Step-by-step explanation:
[tex] \frac{1}{4} a = 3[/tex]
Convert element into fraction : 3= 3/1
[tex] \frac{1a}{4} = \frac{3}{1} [/tex]
Cross multiply
[tex]1a \times 1 = 4 \times 3 \\ a = 12[/tex]
