12: x = 26: 221 how do u do proportions correctly ? ? i don't get it. me plz?

Can someone me with this problem . show your work .

For the equations below which statement is true ? -2x=14 6x=-42

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?