Final answer:
To simplify the expression 13(2x), multiply 13 by 2x to get 26x, applying the distributive property of multiplication.
Step-by-step explanation:
To simplify the expression 13(2x), you need to apply the distributive property of multiplication over addition, often represented as a(b+c) = ab + ac. However, in this expression, there is no addition within the parentheses. So you will simply multiply the number outside the parenthesis, 13, by the number inside the parenthesis, 2x. The simplified expression will be:
13(2x) = 26x
Thus, when we expand 13(2x), the 13 is multiplied by 2x to get 26x. This is a basic rule of algebra where numbers outside the parentheses multiply every term inside.