Question

Four more than 9 times a number is -77 what is the number

Answer 1

Let n = number

9n + 4 = - 77
9n = - 81
n = - 9

Your number is - 9. 

Answer 2

9x +4 = -77
9x =-4-77
9x=-81
x=-81/9
x=-9

Hope this helps!