Please help (question is attatched)

Nine more than four times a number is the same as one less than twice the number. find the number?

If a || b and e || f , what if the value of y ?

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.