Which equation is true?

0.1 / 0.35 - 0.35
0.5 / 0.35 = 7
0.7 / 0.35 = 2
0.35 / 0.7 = 5

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

What is the anwers for 9+2x=5x-3-x