Answer:
a = -4
Step-by-step explanation:
To solve for 'a', isolate 'a'.
a - 15 = 4a - 3
Subtract '4a' from both sides,
a - 4a -15 = -3
Combine like terms,
-3a - 15 = -3
Add 15 to both sides,
-3a = -3 + 15
-3a = 12
Divide both sides by (-3),
a = 12 ÷ (-3)
[tex]\sf \boxed{\bf a = (-4)}[/tex]
