4x-7x=123

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Solution for 4x-7x=123 equation: 



4x-7x=123

We move all terms to the left:

4x-7x-(123)=0

We add all the numbers together, and all the variables

-3x-123=0

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

-3x=123

x=123/-3

x=-41

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