X.x-4=3

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Solution for X.x-4=3 equation: 



X.X-4=3

We move all terms to the left:

X.X-4-(3)=0

We add all the numbers together, and all the variables

X.X-7=0

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

X.X=7

X=7/1

X=7

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