I just need to know what do you do for $134 and $170. For example is it 50x+12=134 because when I did that it gave me 2.44 and I don’t think that’s the answer. But someone please I need help

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)