....

[teal moth]

Need to find rule 17 = 43 , 12= 42 so 11=x?

[reef sonnet]

41.8 ig

17=12+5=42+5=43
so for every 5 numbers on lhs you decrease rhs by 1
so if you reduce 12 by 1, you have to reduce 42 by 1/5 or 0.2
therefore 11=41.8

[teal moth]

u sure? i have to find 1 rule

i have as example 17=43, 12=42 i need to find how much is 11 then

[glacial kayak]

....