1) х+3/20=5/12+2/9 5/12+2/9=15/36+8/36=23/36
х+3/20=23/36
х=23/36-3/20 23/36-3/20=115/180-27/180=88/180=22/45
х=22/45
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1) х+3/20=5/12+2/9 5/12+2/9=15/36+8/36=23/36
х+3/20=23/36
х=23/36-3/20 23/36-3/20=115/180-27/180=88/180=22/45
х=22/45