What value of A would make the expression A (x+3) equivalent to 7x+21

To make the expression A(x+3) equivalent to 7x+21, we need to find the value of A.

We can distribute A to both terms inside the parentheses to get:

Ax + 3A = 7x + 21

Now, we can compare the coefficients of x on both sides:

A = 7

Therefore, the value of A that would make the expression A(x+3) equivalent to 7x+21 is A = 7.