A math teacher opened a window company because he loves seeing shapes or geometrical polygons such as rectagles, squares or quadrilaterals in general as well as triangles in his works. Of course, the math teacher is already familiar with these shapes and how to calculate the angles in between.
10^3= 1,000
hope this helps :)
1/3x + 3/5 * 2/3x = x - 36
1/3x + 6/15x = x - 36
11/15x = x - 36
4/15x = 36
x = 135
sweater costs 1/3x = 45
hope that helps, God bless!