4x-9x=42

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Solution for 4x-9x=42 equation: 



4x-9x=42

We move all terms to the left:

4x-9x-(42)=0

We add all the numbers together, and all the variables

-5x-42=0

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

-5x=42

x=42/-5

x=-8+2/5

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