Question

For the equation 3(7+x)=3x+k, what value of k will create an equation with infinitely many solutions?

Answer 1

Answer: k = 21

Explanation:

3(7 + x) = 3x + k

21 + 3x = 3x + k

21 + 3x - 3x = 3x + k - 3x

k = 21