Mathematics, 08.12.2019 13:31 emma6892

{5x=7y
{x+7y=21

pls i dnt understand

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{5x=7y
{x+7y=21

pls i dnt understand...

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{5x=7y {x+7y=21 pls i dnt understand

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{5x=7y
{x+7y=21

pls i dnt understand