х-1/2=3/4х
х-3/4х=1/2
1/4х=1/2
х=1/2÷1/4
х=1/2×4/3
х=2/3
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х-1/2=3/4х
х-3/4х=1/2
1/4х=1/2
х=1/2÷1/4
х=1/2×4/3
х=2/3