Five plus 4 times a number is equal to the sum of 7 times the number and 11.

Let n represent the number.

Remember "plus" is addition, "times" is multiplication, "equal to" is =, and "sum" is addition.

5 + 4n = 7n + 11

- 4n - 4n

5 = 3n + 11

-11 - 11

-6 = 3n

n = - 2

The equation would be 5+4x=7x+11

Which comes out to:

x = - 2