12х-(4х+4)=9(1-2х)
12х-4х-4=9-18х
8х+18х=9+4
26х=13
х=13/26
х=1/2
х=0,5
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12х-(4х+4)=9(1-2х)
12х-4х-4=9-18х
8х+18х=9+4
26х=13
х=13/26
х=1/2
х=0,5