joannaherring83 joannaherring83

09-09-2020
Mathematics

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To solve the equation y – 4 = 9 for y, what operation must be applied to both sides in order to isolate the variable y?

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Estellia Estellia

09-09-2020

Answer:

[tex]y-4=9[/tex]

The opposite of subtraction is addition, so you would have to add 4 to both sides:

[tex]y-4+4=9+4[/tex]

[tex]y=13[/tex]

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