Math
posted by
Jerald
.
102=8a+5a3a
I add 8a and 5a first to get 13 and then add 3?

Math 
Ms. Sue
No.
Subtract 3a.
102 = 10a

Math 
Jerald
8a+5a=13a=3a=10a Divide 102/10?

Math 
Jerald
Or would the answer be 10a because 8a 5a and 3a are all like terms

Math 
Ms. Sue
To find the value of a,divide both sides by 10.
10a = 102
a = 102 / 10
a = 10.2