2x + 7 = 13
Subtract 7 from each side:
2x = 6
Divide each side by 2:
x = 3
-8
Twice a number can be represented as (2x), where (x) is the number. When you subtract 13 from this, the expression becomes (2x - 13). Therefore, twice a number minus 13 is simply (2x - 13).
8+13 = 21 (8*5)+(13*2) = 66
6
The sum of 13 and twice a number ( h ) can be expressed mathematically as ( 13 + 2h ). This represents adding 13 to two times the value of ( h ).
Five more than twice a number is -13 find the number
-8
8+13 = 21 (8*5)+(13*2) = 66
2n+13
6
Any irrational number, when added to 13, will produce an irrational number.
Any irrational number, when added to 13, will produce an irrational number.
The element with an atomic number twice that of aluminum (13) is magnesium, which has an atomic number of 12.
Then the number is 3
13
2n+13
2N-13