To multiply two fractions, you simply multiply numerators and denominators together.
2 can be read as the fraction 2/1
So, the multiplication is

4x-3=13
move the 3 and add it to 13 and get 16
4x=16
now divide 16 by 4
x=4
Answer:
Step-by-step explanation:
No, because 9 > 3+4
Using the current "regular expressions" in use in Java, Perl, and many other applications, this belongs to "character class" using the [ ] notation.
For characters "either" 1,2,3,4, we write
[1234]
or in this particular case,
[1-4]