For Two: I had to multiply 4 to both sides which would cross the 4 on the left side out and the right side would become 20. Then, I just subtracted 18 to leave x alone and got x=2.
For Four: I had to subtract one from both sides to make 33x on the left and 11x on the right. 33x=11. Then, I had to do: 11/33 to leave the x alone and I ended up with 1/3.
One kilometer is 1000 meters. One hour is 60 minutes, or six segments of 10 minutes each. If you can walk 1000 meters in 10 minutes, you can walk 6000 in an hour (that is REALLY fast, by the way)
