40x + 18(x-3) = 468keeps saying it is 6, but i'm getting 9. can someone do it step by step?

Write an algebraic expression for the word expression the quotient of c and 8

F(x) = x2 − 9, and g(x) = x − 3 f(x) = x2 − 4x + 3, and g(x) = x − 3 f(x) = x2 + 4x − 5, and g(x) = x − 1 f(x) = x2 − 16, and g(x) = x − 4 h(x) = x + 5 arrowright h(x) = x + 3 arrowright h(x) = x + 4 arrowright h(x) = x − 1 arrowright

Write the expression as a single natural logarithm. 2 in a - 4 in y