The question is ambiguous and the two possible answers are:
Twelve times (a number and 5 times the number) = 12*(n + 5n) = 12*6n = 72n
Twelve times a number amd five times the number = 12*n + 5*n = 17*n
There is only one extra rule to algebraic expressions over normal numerical expressions: when two letters are next to each other it means multiply them together: ab means a times b The multiplication symbol is omitted as it looks too much like the letter 'x' can could be confused as such.
x+5: - means a number increased by 5 n - 3: - means a number decreased by 3 5x: - means 5 times a number 5n + 3: - means 3 more than 5 times a number 100 - means one hundred divided by a number n
4x
9x
5+4x
If n is the number 5n is 5 times the number.
a times b
for example, if you have 2x you can write it as : 2 times x or 2 multiplied by x.
There is only one extra rule to algebraic expressions over normal numerical expressions: when two letters are next to each other it means multiply them together: ab means a times b The multiplication symbol is omitted as it looks too much like the letter 'x' can could be confused as such.
x+5: - means a number increased by 5 n - 3: - means a number decreased by 3 5x: - means 5 times a number 5n + 3: - means 3 more than 5 times a number 100 - means one hundred divided by a number n
4x
9x
14
None of the "following" expressions!
x+9x
7/ 3/
3x