561-(720:x+75)=246
-720:х-75=246-561
-720:х= -315+75
х=-720: (-240)
х=3
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561-(720:x+75)=246
-720:х-75=246-561
-720:х= -315+75
х=-720: (-240)
х=3
Verified answer
720:х+75= 561 - 246720:х+75= 315
720:х= 315 - 75
720:х= 240
х = 720:240
х = 3