Question

for the equation 3(7 + x) = 3x + k, which value of k will create an equation with no solutions
A. x
B. 3x
C.15
D.21

Answer 1

3(7+x)= 3x+15
21+3x=3x+15
21-3x=-3x+15
21=15
not a solution so the answer is C. 15