1) х + 220 • 3 = 880
х + 660 = 880
х = 880 - 660
х = 220
2) х • 4 + 240 = 680
4х + 240 = 680
4х = 680 - 240
4х = 440
х = 440 : 4
х = 110
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1) х + 220 • 3 = 880
х + 660 = 880
х = 880 - 660
х = 220
2) х • 4 + 240 = 680
4х + 240 = 680
4х = 680 - 240
4х = 440
х = 440 : 4
х = 110