Answer:
[tex]a=4[/tex]
Step-by-step explanation:
Given
[tex]3a=12[/tex]
Divide both sides by 3 to isolate [tex]a[/tex]:
[tex]\frac{3a}{3}=\frac{12}{3}\\ \\a=4[/tex]
a=4
divide 3 on both sides
