What is an algebraic expression for 18 more than a number n

What is the first step of an indirect proof of a number that is divisible by two

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12