7х+12х+5х+18х=х(7+12+5+18)=х42=6*42=252
7х+12х+5х+18х=42х
х=6;42*6= 252
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7х+12х+5х+18х=х(7+12+5+18)=х42=6*42=252
7х+12х+5х+18х=42х
х=6;42*6= 252