10x-400=20

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Solution for 10x-400=20 equation: 



10x-400=20

We move all terms to the left:

10x-400-(20)=0

We add all the numbers together, and all the variables

10x-420=0

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

10x=420

x=420/10

x=42

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