This isn’t an equation— equations require an equal sign and a variable of some sort on the other side of that said equal sign. Sorry.
Answer:
Mis amigos VIAJARÍAN a España si pudieran.
Explanation:
Mis amigos VIAJARÍAN a España si pudieran.
("My friends would travel to Spain if they could")
That's the use of the conditional... meaning they wish they could... but they cannot.
The verb viajar (to travel) conjugates this way in conditional:
yo viajar-ía
tú viajar-ías
usted, él, ella viajar-ía
nosotros viajar-íamos
vosotros viajar-íais
ustedes, ellos, ellas viajar-ían
Mis amigos = ellos
I’m confused what’s the question