Find three consecutive even integers such that the sum of the least integer and the middle integer is 22 more than the greatest integer

How do i put 3(x+7) in distributive property

Write the equation in general quadratic form: plz !

The stairs leading from the ground to the entrance of a plane forms a right triangle with the ground. if the distance of the stairs measures 22 feet and the ground distance measures 11 feet, how high is the entrance to the plane from the ground? which diagram represents this scenario? / 22ft © 22ft 11 ft 11 ft 22 it