X-3+z=7

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Solution for X-3+z=7 equation: 



X-3+X=7

We move all terms to the left:

X-3+X-(7)=0

We add all the numbers together, and all the variables

2X-10=0

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

2X=10

X=10/2

X=5

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