Answer:
63
Step-by-step process:
I can't tell what the wording of your question is, but this is how I interpreted it:
The equation:
, where you have to solve for x.
There are two ways of doing this:
Process 1:
We multiply 5 with x and 7 with 45:
5x = 7 * 45
5x = 315
x = 63
Process 2:
Because 45 is 5 * 9, logically, the value x should be increase 9 times from its original number, 7. So then 7 * 9 = 63.