Mikayla is the communications director for a politician and has recommended that a total of $41$ speaking events are given by the politician before election day. Each speaking event is either a formal speech or an informal talk. Mikayla also recommends a total of $9$ more formal speeches than informal talks. Which of the following systems of equations can be used to find out the number of formal speeches $s$ versus the number of informal talks $t$? [[☃ radio 1]]