a-6=8-(9+a)
a-6=8-9-a
move "a" to the left side with opposite sign and 6 to the right side with opposite sign
a+a=8-9+6
2a=5
a=5/2
a=2.5
Solve for a: a-6 = -1-a Add a+6 to both sides: 2 a = 5 Divide both sides by 2: Answer: | a = 5/2
