La) 43 - 2x = 11 its regular equations

Can someone me with the property questions for 12 13 and 14 plz

Solving algebraic equations 2m+3=11

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.