7x=300+x

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Solution for 7x=300+x equation: 



7x=300+x

We move all terms to the left:

7x-(300+x)=0

We add all the numbers together, and all the variables

7x-(x+300)=0

We get rid of parentheses

7x-x-300=0

We add all the numbers together, and all the variables

6x-300=0

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

6x=300

x=300/6

x=50

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