5
Y=3x+2
If you call your number x, the expression would be 5x.
If you call the number "n", then the expression would be "n+5".
That would be the number 1.
Let the number be x and so the expression would be: x+20
an even number.
An number with a x after mean multiply, so it would be 4x12=48
If you call your number x, the expression would be 5x.
You would multiply the number of mols by Avogadro's number which is 6.0221415 x 1023
If x is used to represent the unknown number, then the expression for 20 times a number would be 20x.
If you call the number "n", then the expression would be "n+5".
That would be the number 1.
Let the number be x and so the expression would be: x+20
an even number.
Since the prefix "kilo" means thousand, you multiply by 1000.
you would get an even number!
If you want to make it equivalent, you would have to multiply by the same number both. So, that's how you multiply it.
This expression would be 3x-7.