This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let me first solve the given equation :-

x-15 = 25

x = 25 + 15

x = 40 { If equals are added to equals then the whole is equal is the                                 Euclid's axiom used here )