Answer:
a = 4
Step-by-step explanation:
first, you are supposed to subtract both sides by 6 so you will get:
6 - 4a = -10
-6 -6
-4a = -16
Then, you divide both sides by -4 to cancel out the -4 before the "a"
-4a = -16
-4 -4
Last, you will get a = 4 and that is your answer because when you divide a negative number by another negative number, you will get a positive number.