Solve each equation or formula for the specified variable. Please explain how you do it because I don't understand it. 1. A = 1/2πr^2 for π 2. x-y ----- = 3 for x 2z 3. 4m-n=1 for n 4. 9a = 12a + 3b fir b __________ 4

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Solve each equation or formula for the specified variable. Please explain how you do it because I don't understand it. 1. A = 1/2πr^2 for π 2. x-y ----- = 3 for x 2z 3. 4m-n=1 for n 4. 9a = 12a + 3b fir b __________ 4

Mathematics
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Says solve for the indicated variable, but \pi isn't considered a variable.
That's what my homework says. I have an example on my notes which is C = 2pir2 pi = c/2r
Literal equations.

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You should ask your teacher whether pi is considered a variable or a constant.
I'm assuming variable because of the directions that say, "Solve each equation for the indicated variable."
https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=is%20pi%20considered%20a%20constant

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