
William W. answered 11/06/24
Math and science made easy - learn from a retired engineer
Let "n" be "a number. So six times "a number" would be "6n" and "six times a number added to -9" would be "6n + -9" or "6n - 9".
And since "six times a number added to -9" is -33 then:
6n - 9 = -33
Add 9 to both sides to get:
6n = -24
Divide both sides by 6 to get:
n = -4
So the "number" is -4