I assume you need to create an equation and solve it here. If we let x represent the unknown number, then we can write:
4 + 2x = 6
"four more" means to add 4, "product of a number and 2" means to multiply , and "is" can be represented with am equal sign.
To solve the equation, use inverse operations:
Subtract 4 from both sides of the equation:
4 + 2x - 4 = 6 - 4
then 2x = 2
Divide both sodes of the equation ny 2:
2x/2 = 2/2
x = 1
The missing number would be one.