Answer:
-4
Step-by-step explanation:
a - 15 = 4a - 3
Subtract "a" on both sides
a - a - 15 = 4a - a - 3
-15 = 3a - 3
Add 3 on both sides
-15 + 3 = 3a - 3 + 2
-12 = 3a
Now divide by 3 on both sides to isolate the variable
-12/3 = 3a/3
-4 = a
Check
Now that we have what "a" is we can substitute that and see if its true
a - 15 = 4a - 3
-4 - 15 = 4(-4) - 3
-19 = -16 - 3
-19 = -19 CORRECT
Hope this helped!
Have a supercalifragilisticexpialidocious day!
