x - 47 = (57 - x) - 50
=> x - 47 = 57 - x - 50
=> x - 47 - 57 + x + 50 = 0
=> 2x - 54 = 0
=> 2x = 54
=> x = 27
x-47=(57-x)-50
x-47=57-x-50
x+x=57-50+47
2x=54
x=54:2
x=27
x - 47 = (57 - x) - 50
=> x - 47 = 57 - x - 50
=> x - 47 + 57 + x + 50 = 0
=> 2x - 54 = 0
=> 2x = 54
=> x = 54 / 2
=> x = 27