5x+7x=240

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Solution for 5x+7x=240 equation: 



5x+7x=240

We move all terms to the left:

5x+7x-(240)=0

We add all the numbers together, and all the variables

12x-240=0

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

12x=240

x=240/12

x=20

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