6x-21=42

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Solution for 6x-21=42 equation: 



6x-21=42

We move all terms to the left:

6x-21-(42)=0

We add all the numbers together, and all the variables

6x-63=0

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

6x=63

x=63/6

x=10+1/2

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