Four times the sum of five times a number and 9 is 16

Question

Assign the variable x and the equation used to describe the problem

Answer 1

4 * (5x+9) = 16

Answer 2

4(5x+9)=16

5x+9= 16/4= 4

5x = -5

x= -1

check the answer

4(5(-1)+9) =16

4(-5+9)=16

4(4)=16

16=16

voila