х+50=690
х=640.
х-3200=57800
х=61000.
5000-у=2217
у=2783.
1200+у=2940
х=1740
640 1
61000 2
2783 3
2060 4
х+50=690
х=640.
х-3200=57800
х=61000.
5000-у=2217
у=2783.
1200+у=2940
х=1740
640 1
61000 2
2783 3
2060 4