300x=12+42x

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Solution for 300x=12+42x equation: 



300x=12+42x

We move all terms to the left:

300x-(12+42x)=0

We add all the numbers together, and all the variables

300x-(42x+12)=0

We get rid of parentheses

300x-42x-12=0

We add all the numbers together, and all the variables

258x-12=0

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

258x=12

x=12/258

x=2/43

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