Which equation has exactly one solution? 10x - 3x + 20 + 45 = 100 + 7x - 3 4x - 3x = 10(3 - x) + 11x 10x - 20 + 45 = 19 + 7x + 3(2 + x) 9(x - 3) + 28 = 4x - 3 * i will mark braineist*

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2