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2 х 7. 2х+7=х/3. 4х-7=2х. (4х2 – 7х – 3) – (2х2 – х +7). 7х+11=4х+2.
2х+7=х/3. 4х-7=2х. (4х2 – 7х – 3) – (2х2 – х +7). 7х+11=4х+2.

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