x=5
explanation: here u have 3x+2=17 first u solve with the like terms which are 2 and 17 because 3 has x which is a variable and theres no other number here that hs a variable so u do 17-2 to get 3x=15 now theyre asking for x on its own, to get rid of the 3 in x u divide 3x by 3 and 15 by 3 and u get x=5