If the sqrt of 7-y=6, then y=?

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If the sqrt of 7-y=6, then y=?

Guest Aug 4, 2014

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Best Answer

+33661

+10

√(7 - y) = 6

Square both sides:

7 - y = 36

Add y to both sides:

7 = 36 + y

Subtract 36 from both sides:

-29 = y or just y = -29.

Check in the original equation:

√(7 - (-29)) = √(7+29) = √36 = 6 ok.

Alan Aug 4, 2014

1⁺⁰ Answers

+33661

+10

Best Answer

√(7 - y) = 6

Square both sides:

7 - y = 36

Add y to both sides:

7 = 36 + y

Subtract 36 from both sides:

-29 = y or just y = -29.

Check in the original equation:

√(7 - (-29)) = √(7+29) = √36 = 6 ok.

Alan Aug 4, 2014

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