X+7x=2400

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Solution for X+7x=2400 equation: 



X+7X=2400

We move all terms to the left:

X+7X-(2400)=0

We add all the numbers together, and all the variables

8X-2400=0

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

8X=2400

X=2400/8

X=300

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