Корнем какого уравнения является число 12?
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28.08.2019 06:10
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3
подходит 2 т.к 4х+2(Х-1)=5х+10
раскроем скобки:4х+2х-2=5х+10
х в одну сторону числа в другую:6х-5х=10+2
х=12
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