Please help soon! Thanks (giving away 30 points!)

Bob solved the inequality problem below incorrectly. explain his error and redo the problem showing the correct answer. −2x + 5 < 17 −2x + 5-5 < 17-5 -2x/-2 < 12/-2 x < -6

Aguy out ): this is hard on the brain and i can only do so much :

Idon’t really understand. can i get some for a and b ? you !