GIven f(x) = 3x + 2, Find f(x) = 8 (Solve for x)

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Which diagram shows lines that must be parallel lines cut by transversal?

7+(3n++8) what is the answer to this?