Comparing value of 4 in 3,492 is blank times the value of 4 in 704

The 4 in 3492 is 400, while it's value in 704 is 4, therefore it is 100 times as big in 3492 than it is in 704.

Two equations with infinite solutions would look the exact same. Example:
y=mx+b
y=mx+b
Example 2
y=2x+5
y=2x+5
For an equation with no solution they would have the same slope but different y intercepts. An equation with same slope and same y intercepts would have infinite solutions.