The angles of a quadrilateral are $x$, $5x + 15^\circ $, $3x - 25^\circ$, and $4x - 20^\circ $. Find the measure of the largest angle of the angle
Sum of the angles = 360 o
x + 5x+15 + 3x-25 + 4x-20 = 360
solve fo x = 30 now YOU can figure which angle is the largest.....