280-40n=7

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Solution for 280-40n=7 equation:



280-40n=7
We move all terms to the left:
280-40n-(7)=0
We add all the numbers together, and all the variables
-40n+273=0
We move all terms containing n to the left, all other terms to the right
-40n=-273
n=-273/-40
n=6+33/40

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