Yeah help plz

What value of x will make 1/2x = 25 true?

What is the 12th term of b(n)=-4-2(n-1)

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

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?