Starting at East (0°), a 100° clockwise turn puts you at 100° (South-East). From there, a 145° anti-clockwise turn means moving back 145°. Final direction = 100° - 145° = -45°. A bearing of -45° is the same as 315°, which is North-West. The provided solution says North-East, which would be +45°. This means the net movement is 145° (anti-clockwise) - 100° (clockwise) = 45° anti-clockwise from East. This is North-East.