Answer:
A= .68
Explanation:
10a+6/5+9=17
First, I start by changing 6/5 to a decimal
6/5 = 1.2
Now Rewrite your equation
10a+1.2+9=17
Combine Like terms
1.2+9= 10.2
Rewrite
10a+10.2=17
Subtract 10.2 on by sides

10.2 - 10.2 cancel out.
17-10.2 = 6.8
10a=6.8 divide 10 on both sides
gives you a =.68