Answer:
[tex]4[/tex]
Step-by-step explanation:
[tex]4a=a+12\\3a=12\\\dfrac{12}{3}=4\\\\a=4[/tex]
Step-by-step explanation:
4a-4=8+a
try to get the numbers and variables on different sides, add four to both sides:
4a=12+a
subtract a to both sides:
3a=12
divided a by 3 because a must always be 1:
a=4
