If the vowel following an x is stressed, the x is pronounced as /gz/, as in examine and exist. If an x is followed by a consonant, or if it’s at the end of a word, it is pronounced as /ks/, as in expert and tax. Also, note that a double c often produces an x or /ks/ sound, as in the word accent. If these two sounds don’t occur together in your native language, be very careful to pronounce both of these consonant sounds.