ответ на фото..............
[tex]\displaystyle\bf\\14x+14y=28\\\\y=0\\\\14x+14\cdot 0=28\\\\14x=28\\\\x=28:14\\\\\boxed{x=2}[/tex]
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ответ на фото..............
[tex]\displaystyle\bf\\14x+14y=28\\\\y=0\\\\14x+14\cdot 0=28\\\\14x=28\\\\x=28:14\\\\\boxed{x=2}[/tex]