X+x-7+x+4=300

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Solution for X+x-7+x+4=300 equation: 



X+X-7+X+4=300

We move all terms to the left:

X+X-7+X+4-(300)=0

We add all the numbers together, and all the variables

3X-303=0

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

3X=303

X=303/3

X=101

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