solve for x:

4x + 12 = 8 (given)

4x = -4 (subtraction)

x = -1
what is the reason for the last step in the argument?
a) division
b) addition
c) subtraction
d) symmetric property

What is the value of x? enter your answer in the box. photo attached.

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.