Ответ:
-15+13х-6х=4х+12-3
-15+13х-6х-4х-12+3=0
-15-12+3= -24
13х-10х=3х
3х-24=0
3х=24
х=8
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Ответ:
-15+13х-6х=4х+12-3
-15+13х-6х-4х-12+3=0
-15-12+3= -24
13х-10х=3х
3х-24=0
3х=24
х=8