Find and replace number incrementally

[Cubilas]

Hello!

I am trying to find all instances of a string (<Instrument number=“1”>) and increment the number in quotes by another number N.

Example :
if N = 30 then :
<Instrument number=“1”> will be replaced with <Instrument number=“31”>
<Instrument number=“2”> will be replaced with <Instrument number=“32”>

Is this possible?

Any help would be great, thanks!

[Ekopalypse]

@Cubilas

I assume you want something like this.