3x+5+7x-7=280

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Solution for 3x+5+7x-7=280 equation: 



3x+5+7x-7=280

We move all terms to the left:

3x+5+7x-7-(280)=0

We add all the numbers together, and all the variables

10x-282=0

We move all terms containing x to the left, all other terms to the right

10x=282

x=282/10

x=28+1/5

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