10x-9x=12+30

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Solution for 10x-9x=12+30 equation: 



10x-9x=12+30

We move all terms to the left:

10x-9x-(12+30)=0

We add all the numbers together, and all the variables

10x-9x-42=0

We add all the numbers together, and all the variables

x-42=0

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

x=42

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