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!
This expression would be 3x-7.
If you want to make it equivalent, you would have to multiply by the same number both. So, that's how you multiply it.