Question

What is the sum of a and b?

Answer 1

a=13, b=7

Explanation:

You can use the exponent rule

`3x^(a-5)y^(9-b)=3x^(8)y^(2)`

so
`x^(a-5)=x^(8)` so

a-5=8

a=13

`y^(9-b) =y^(2)` so

9-b=2

b=7