You would need to see the rest of the equation to plug in 7 for x. Treat it as y=equation and replace any x with 7.
Answer:
Step-by-step explanation:
4 1x2x3 =6
5 3x4x1=12
6 2x3x2=12
Hope that help
Answer:
99/34 i believe
Step-by-step explanation:
I believe that 30.5 as a fraction is 30 and 1 half but don't take my word
Find the rate in which both balls make one full rotation around the track.
Ball A:

It takes 30 seconds for Ball A to make a full rotation.
Ball B:

It takes 20 seconds for Ball B to make a full rotation.
Find the least common multiple of 20 and 30 to find the time at which they'll meet.
Multiples of 20: {20,40,60}
Multiples of 30: {30,60}
60 is the least common multiple of both 20 and 30.
The balls will meet again at
60 seconds.