13х - 169 + 196х - 28 = 33х - 121 + 28 +10х -21
13х +196х- 33х - 10х = 169 +28 - 121 -21 + 28
166х = 83
х= 0,5
13х+196х-33х-10х=169+28-121+7
166х=83
х=83:166
х=0.5
13х - 169 + 196х - 28 = 33х - 121 + 28 +10х -21
13х +196х- 33х - 10х = 169 +28 - 121 -21 + 28
166х = 83
х= 0,5